Experienced and professional animal trainer provide their insights in answering this question :
A. If he lost lately approx 25 % of his body mass you should see a vet asap. This huge decrese of weight leads in cats to serious liver disorder . Also primary cause of loss of appetite should be found to aply proper treatment.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Well-recognized causes of weight loss in old cats include chronic renal disease, diabetes mellitus, hyperthyroidism, inflammatory bowel disease (IBD), exocrine pancreatic insufficiency, and dental problems, to name a few.
The causes of unintentional weight loss in cats range from simple lifestyle changes to serious illness. Any noticeable weight loss in your cat warrants a visit to your veterinarian to rule out serious health conditions. They will be able to run the necessary tests to determine what might be at the root of the problem.
When your cat is losing weight but still eating, there might be an underlying medical problem, particularly hyperthyroidism or diabetes. If your cat is losing weight rapidly or is underweight, consult your veterinarian.
There are a variety of conditions in the gastrointestinal tract that may cause cat weight loss. When this is the case, other symptoms may include diarrhea, lack of appetite, and vomiting. Common GI problems that produce weight loss in cats include inflammatory bowel disease, food allergies, and certain infections.
Feeding the older cat

Weight loss can be an early sign of illness, so check with your vet. It is common for older cats to develop medical conditions that cause them to lose weight, such as kidney and thyroid disease. If your cat is losing weight, it is important to consult your vet as soon as possible.

Ideal Weight for Cats

Most domestic cats should weigh about 10 pounds, though that can vary by breed and frame.

Healthy (but skinny) cats may simply need more meals per day and/or free access to dry food in order to gain weight. Cats prefer to `graze` or eat small meals throughout the day so having food available all day long can make all the difference.
On the other end of the spectrum, if your cat is drinking more water than usual in combination with not eating, this could be a symptom of a health problem such as diabetes or kidney disease. It`s important you talk to your vet if this is happening to your pet.
Indoor cats generally live from 12-18 years of age. Many may live to be in their early 20s. The oldest reported cat, Creme Puff lived to be an amazing 38 years old. Outdoor cats generally live shorter lives due to being more likely to be involved in traumas such as motor vehicle accidents or dog attacks.
Cats` appetite changes as they grow older. For some felines this means a bigger appetite and looking for indulging treats more often. However, it`s best to make sure the vet rules out the medical conditions mentioned above before blaming the senior years for your cat`s newly-found love for food.
Parasites – Intestinal worms survive by stealing nutrition from the food your cat eats. A heavily worm-infested cat could lose weight because she`s not getting any energy from her meals, no matter how much she eats.
Cats begin to change and slow down as they reach their senior years. One of the most noticeable signs is a gradual reduction in their weight. Older cats losing muscle mass is natural and can be reduced with proper nutrition.
In recent years, feline ages and life-stages have been redefined, cats are considered to be elderly once they reach 11 years with senior cats defined as those aged between 11-14 years and super-senior cats 15 years and upwards.
The average lifespan for a pet cat is probably around 13 to 14 years. However, although their lifespan varies, a well cared for cat may commonly live to 15 or beyond, some make it to 18 or 20 and a few extraordinary felines even pass 25 or 30 years of age.
A study of cats aged 11 and up found that most slept between 12 and 18 hours a day, though a significant number slept more. In addition to sleeping more, it is natural for older cats to show less interest in active pursuits, such as hunting and playing outside, preferring instead to spend quiet time with their owners.
As cats age, their metabolism changes, and their bodies lose muscle mass. Your feline may be feeling hungrier to keep up with these changes. Your veterinarian can help determine the amount of fats, proteins, amino acids, and carbohydrates your cat should ingest daily to help lessen the cries for more food.
Yes, you should be able to feel your cat`s spine, along with their ribs and hip bones. That said, there`s a difference between being able to feel these bones and having them be protruding. As a general rule, if these bones are too prominent, it could be a sign that your pal is underweight or malnourished.
If your cat is hungry all the time, it could be a sign of a serious health issue like hyperthyroidism, diabetes or cancer. This handy guide looks at possible causes of overeating, symptoms to look out for and what to do if you`re concerned about your cat`s feeding habits.
Male cats are less likely to accept other cats into their household as adults. Male cats are likely to be larger, eat more, and keep growing for longer. Owners report that male cats are more likely to be affectionate and less likely to be aggressive.
Like people, cats can go longer without food than water. Cats can survive for about two weeks without eating but only three days without drinking. The longer your cat goes without proper nutrition, however, the weaker they become, so it`s important to contact your vet if you suspect they haven`t eaten in a day or more.
The most common reason older cats begin drinking and urinating excessively is because their kidneys are starting to decline. The kidneys are responsible for filtering the blood and producing urine. As cats age, their kidney function decreases.
The average cat lifespan is between 13-17 years. Some lucky felines have been known to live 20 years or more—the world record holder for oldest cat on record, adorably named Creme Puff, lived to be a whopping 38 years old.
While dependent on many things, including luck, some domestic cats can live to up to 20 years old. During their life they will go through six key life stages which may help owners understand certain health/behavioural problems that could arise and things to keep an eye on.
Maximum lifespan has been estimated at values ranging from 22 to 30 years although there have been claims of cats living longer than 30 years.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Why do cats meow?
ANSWER : A. Cat parents often wish they could better understand what their favorite feline friends want or desire. A cat’s meow can be interpreted in many different ways and can indicate an array of feelings and needs. Here are some of the most common reasons for your cat’s vocalizations:

1. Greeting- Many cats will meow as a greeting when you enter your home or walk into a room. Cats will also meow at another cat or animal in the household to extend a hello and acknowledge the other animal’s presence.

2. Attention – An exuberant meow followed by leg rubbing or another attention seeking behavior may indicate your cat is looking for some quality time spent together. Some petting or rubbing behind the ears may be in order.

3. Hunger – A meowing cat is often a hungry cat. This is one of the most common reasons for a cat to vocalize to their owners. A cat will meow to get your attention at feeding times or even when they want extra food.

4. Sickness – A sick or hurt cat may begin to meow excessively, warranting a visit to the veterinarian. There are numerous reasons for a cat in distress to meow—whether it is related to an upset stomach, an injured leg or a urinary blockage. These meows should be carefully investigated.

5. Entering or leaving – Most cats will vocalize when they want to be let in or out of a room. You may notice when you are in the bathroom or behind the closed door of a room that your cat begins to meow, scratches at the door, and often reaches its paw under the door. This is a clear indication that the cat wants to be where you are.

6. Angry – An agitated cat may meow to warn their owner or another household pet that they are upset and would like to be left alone. This angry meow may increase in sound volume as the cat becomes more stressed or agitated. Often a cat will exhibit this type of meow at the veterinary office when they are unhappy with their examination or restraint.

Each feline is different and so are their vocalizations. Learn to understand the variety of meows your cat uses on a daily basis. This will help you develop a better relationship with your cat and help them live a more trusting and happier life.

Q. How do I determine how much my overweight pet should weigh?
ANSWER : A. There are many tools to determine overweight and obesity levels in pets. A new tool, morphometric measurements and body fat index, are available to accurately determine a pet’s ideal weight; this will allow an accurate determination of the amount of food a pet should receive to achieve weight loss. Feeding the correct amount will lead to greater weight loss success.

There are many weight loss food options to help pets reach their ideal weight. Your veterinarian can help make a ideal weight recommendation. Here are some tips to help your dog lose weight in a healthy and safe way:

1. Diet: Providing a healthy and well balanced diet is essential to your pet’s overall health. Finding the right food for your dog can be a challenging process. For those overweight animals many commercial dog companies offer weight loss diets, but it is important to evaluate food labels for adequate nutritional content.

You want to ensure you are not missing other essential vitamin or mineral content. Volume of food is also important and the amount of food that works for one breed of dog may not be the same for another breed of dog. Portion control as opposed to free-choice feeding can help your dog to drop a few unnecessary pounds.

There are also prescription weight loss foods designed by veterinary nutritionists, such as Hill’s r/d (http://bit.ly/1AoENSd). Some pet owners find that home cooking is the best option for helping to provide a well-balanced and realistic diet plan. There are websites such as balanceit.com that offers recipes to fit your dog’s specific needs. Consulting with your veterinarian or a veterinary nutritionist to find the appropriate diet is a great way to help your dog be as healthy as possible.

2. Exercise: Another great tactic for weight loss for your dog is exercise. Whether this is through running, walking or playing with a favorite toy all of these are wonderful types of exercise to help keep your dog at a lean and healthy weight.

For those pet owners with busy schedules utilizing professional dog walking services or playtime through dog daycare services is another option. It has been shown that those pet owners that exercise regularly with their pets generally live a healthier lifestyle.

3. Physical therapy: As animals age pet owners offer encounter their favorite canine having more difficulty walking and have a dwindling desire to play with toys. Physical therapy, specifically hydrotherapy is a wonderful way to help older and arthritic animals gain more mobility and lose weight. Hydrotherapy has been proven to have several therapeutic effects on the body including, muscle strengthening, relief of swelling, decreased joint pain, less stiffness in limbs, improved circulation, weight loss, and increased tissue healing to name a few. For more information on the benefits of hydrotherapy:
http://bit.ly/1w1qqoy

4. Veterinary visit and blood work: Weight gain can also be related to underlying health concerns such as hypothyroidism or other endocrine disorders. Scheduling a veterinary evaluation and routine blood work can be another important component in increasing the longevity of your dog’s life. Conditions such as hypothyroidism that predispose dogs to gain weight can be treated with a daily medication to improve hormonal balance. If feel that your dog is unnecessarily overweight there can be an underlying health condition that needs to be addressed.

5. Healthy treats: Pet owners love the chance to reward their favorite canine companion with treats and most dogs jump at the chance to consume these delicious products. The problem is many treats, which can include commercial dog treats or table scrapes can add many unnecessary calories to your dog’s daily intake. Reading labels and making note of the calories in these treats is an important component of understanding your dog’s overall health. Treats should not exceed more than 10 percent of your pet’s daily calories. There are healthier treats that can be offered to your pet to keep calories lower yet provide a fuller sensation. A pet owner can add steamed or pureed vegetables, such as carrots, green beans or sweet potato to add more fiber and thus a fuller feeling for your dog.

Q. My cat continues to scratch on furniture and carpets. He has plenty of scratching posts around the house. Please help!
ANSWER : A. Scratching is a natural behavior in cats that can be frequently frustrating for pet owners who want to keep their furniture from being shredded on a constant basis. The texture of furniture and carpet is very appealing to cats and this why they frequently choose to spend their time on this activity as opposed to playing with their own cat toys. Here are some suggestions to help curb this unwanted behavior:

1. Purchase a cat scratching post or cat tree that is covered in carpeted or textured material. Place it in an appealing spot that your cat would be inclined to spend time (eg. in the sun). You can also place catnip on the scratching post or cat tree to make your cat even more interested in the new object.

2. You can utilize double sided tape on the ends of the furniture because you cat will not like the sticky feeling and will learn to not scratch in that region. Use the tape that has a lighter adhesive in order to prevent any permanent damage. Other materials, such as aluminum foil or bubble wrap can also be placed on the furniture to discourage the scratching.

3. Keep nails trimmed short by either learning to do this on your own at home or using a veterinary technician, or groomer. Nails can usually be trimmed every 6-8 weeks.

4. Redirect the unwanted behavior. If your cat begins scratching, use a favorite or new toy to distract the cat from the scratching. Give your cat positive praise for not scratching.

5. As a last resort you can use a spray bottle full of water to spritz your cat when he or she is scratching inappropriately at your furniture. Generally, cats do not like water and this will discourage them from continuing the behavior.

Have patience with your cat because it can takes time to understand this is an unwanted behavior and that furniture is not another toy for them to use. You can always consult your veterinary or veterinary behaviorist to help with ideas or further solutions to this problem.

Read Full Q/A … : I found Pickle on

Q. My cat is a male and has been nurtured he is 13years old he has lost his appetite and has lost a large amount of weight. He is a inside cat.
ANSWER : A. If he lost lately approx 25 % of his body mass you should see a vet asap. This huge decrese of weight leads in cats to serious liver disorder . Also primary cause of loss of appetite should be found to aply proper treatment.

Q. I found a large amount of pee from my unfixed male cat and it had blood in it. I notice later what looked similar to crystals in the same puddle. Help
ANSWER : A. You should have your cat examined and a urinalysis done immediately. Some cats do form crystals in their urine which leads to bladder inflammation,look in the urine, pain and in creased frequency of urination. The specific problem with male cats is the narrow width of the urethra through which the urine passes. Make cats have a very narrow urethra unlike female cats. The crystals, blood and other “sludge” that forms in the bladder when a cat has cystitis can cause a blockage in male cats and this is an emergency. A urinalysis can determine the extent of the problem and allow your vet to recommend appropriate treatment before it becomes an emergency. Your cat should be seen today.

Read Full Q/A … : Causes of Blood in Cat Urine

Q. My cat is pooping outside of the litter bix. He is 2 1/2. He did this as a kitten. It stopped then started about 3 months ago. Litterbox is clean.
ANSWER : A. Inappropriate elimination or house soiling can be a frustrating problem but with a bit of detective work on your part, there is hope. First, before deciding that this is a behavioral issue, any medical problems (diarrhea, constipation, fecal incontinence, pain on defecation, etc.) need to be ruled out and/or treated. If your cat receives a clean bill of health from your vet but is still eliminating outside the litterbox, then we need to consider that something about the box itself might be aversive to your cat. Cats can be quite finicky about their litterbox and toileting habits. Below I have listed common recommendations and cat preferences for litterbox use. Review the list and make any changes that could account for your cat’s aversion to defecating in the litterbox:
* Soft, fine-grained clumping litter (vs, coarse-grained, non-clumping litter)
* Unscented
* 1 – 1 1/2 inch depth (especially older cats or cats with hip problems)
* Larger pans (especially for large cats) – want to get whole body inside – poop just outside the box might mean the box is too small
* Open, non-hooded
* At least one shallow side to get in and out easily
* Easy to get to – not hidden away, preferably in areas they spend time in or near – and not near appliances that make scary, unpredictable noises (washers, dryers, refrigerators)
* Scoop minimum 1X/day – preferably 2
* Clean the litterbox with soap and water and put in fresh scoopable litter at least once/month (instead of just continuously adding)
* Some cats prefer to urinate in one box and defecate in a separate box, so you may need 2 boxes even if you just have 1 cat. Multi-cat households should have 1 box/cat plus 1 extra.

Q. Male neutered cat [1 1/2 years old] has just started trying to spray everywhere around the house. Nothing is coming out. No recent changes.
ANSWER : A. Changes in urinary habits can be caused by a number of things, especially in neutered male cats. Attempting to urinate or have accidents in places other than the litter box can often be a sign of a urinary tract infection, or crystals and debris in the bladder causing problems. Pets may need to go more frequently, may dribble or urinate in small amounts more often, may have accidents or may have blood-tinged or cloudy urine.Infections are usually treated with medications and changes to the diet, however in some cases of large stones or crystals surgery may be needed.

Male cats can also experience urinary blockage. This is due to a unique anatomical part or the urethra that forms a U-shape before exiting the body in male cats. If a cat has crystals or other debris in the urine, it can block at this point preventing urine from being able to exit. Cats may attempt to urinate without producing anything, may become very vocal (indicating pain) or may have a hunched back, full abdomen or pain in the abdomen (protecting the very full bladder). Urinary blockage IS a medical emergency so if suspected, your vet or local emergency clinic should be contacted immediately. Treatment usually involves a hospital stay and catheterization of the bladder to remove the blockage and allow urine to drain followed by medications and a change in diet to prevent further problems.

It is best to try and collect a sample of urine and make an appointment for your cat if he has had a change in urinary habits. If you do suspect a blockage, then contact your vet ASAP is best.

Q. My 16 year old indoor cat has lost most of her body weight in the last couple of weeks. I think she may have worms. What do I do?
ANSWER : A. Weight loss can be a serious sign of many underlying conditions in older cats, most notably metabolic issues such as thyroid disease or organ dysfunction. If no worms are visible in her stool, bringing in a stool sample to check for them, or making a wellness exam to check for any other causes of the weight loss are best to help find why your cat is losing weight prior to just treating for worms.

If worms are present, then determining the type of worms they are is the next step. Worms generally cause digestive upset in cats such as vomiting or loose stools in addition to weight loss in large infections. The two most common types include roundworms (long spaghetti-like strands) and tapeworms (small rice grain segments). Roundworms can generally be cured with any over the counter wormer, however tapeworms need a wormer specific to them to be given. Tapeworms are also spread via contact with fleas, so starting a flea prevention treatment can help prevent further infections. Cleaning all bedding and the environment your cat is in will also help for any type of internal parasite infection.