Experienced and professional animal trainer provide their insights in answering this question :
A. you should see a vet to check what is wrong. it sounds like problem with large intestine. collect a fresh stool sample before visit

How to Identify Common Pet Problems ?

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Causes of blood in cat poo include food allergies or eating something unsuitable, infection, parasites, reaction to some medications, anal gland issues and colitis (inflammation of the large intestine). Even stress can cause blood in your cat`s poo, for instance if you`ve recently moved house or it`s fireworks season.
Dark or black blood

If the blood is dark red or black and looks like coffee grounds, this is due to the partial digestion by enzymes secreted in the small intestine, and is usually an indicator of a problem further up the intestinal tract. This could indicate a serious issue such as a blockage.

A dietary allergy or intolerance can also cause blood in the stool. Cats that are allergic to proteins in their food can lead to inflammation and bleeding in the large intestine (colon). If your cat is found to have a dietary allergy, he or she will likely be put on a special diet that eliminates the offending protein.
Watery blood – In extreme cases of bloody diarrhea, a cat`s stool may look like water mixed with blood. Blood clots in poop – If there is enough blood in a cat`s lower digestive tract, it may clot and look dark red and somewhat like gelatin.
Diarrhea, often with mucus and/or fresh blood, is the hallmark of colitis. Pets with colitis often defecate with greater urgency and frequency. They may strain while defecating, causing some pet owners to mistakenly believe the pet is constipated. Some pets may vomit.
The signs associated with parasite infections are fairly nonspecific, such as a dull haircoat, coughing, vomiting, diarrhea, mucoid or bloody feces, loss of appetite, pale mucous membranes, or a pot-bellied appearance.
Treatment of blood in the stool of your cat will depend on the underlying condition causing the signs. If food is the suspected culprit, your veterinarian may recommend a bland or prescription diet to help eliminate irritation. Food changes should generally be done gradually to eliminate additional digestive upset.
Feline inflammatory bowel disease (IBD) is a condition in which a cat`s gastrointestinal (GI) tract becomes chronically irritated and inflamed. Inflammatory cells infiltrate the walls of the GI tract, thickening them and disrupting the ability of the GI tract to properly digest and absorb food.
Causes of Melena in Cats

The most common causes are usually diseases of the gastrointestinal tract that create ulcerations or cause bleeding into the tract. Ingestion of blood or bleeding from clotting abnormalities can also cause melena.

If she`s not covering her poop, it could be because of nervousness, competition with other cats, health issues, or other reasons. You can encourage your cat to cover her poop by trying different litter and litter boxes, calming products, and decreasing the stress in her life.
Light-brown/yellow cat poop: this colour points to digestive issues that could originate in the liver or bile. Contact the vet and ask them to investigate this symptom further.
Treatment for colitis in cats

Acute colitis often resolves itself in a few days without requiring treatment; however, chronic or episodic colitis almost always requires medical attention.

How is colitis diagnosed? The diagnosis of colitis is based on your pet`s clinical signs and history, microscopic evaluation of the feces, rectal examination, cytology, and blood tests.
The answer is yes. Unfortunately, even cats that never venture outside are still at risk for intestinal parasites like tapeworms and roundworms. That`s why it`s important to familiarize yourself with the types of worms your indoor cat could get, as well as the treatment options.
So how do indoor cats get infected with worms? Indoor cats will hunt just about anything in your home. Rodents, insects, and other household pests harbor worm eggs, which are passed on to your cat when he devours them. Mice and the common house fly are just two of the many critters that can carry roundworms eggs.
For some, stress can cause you to have more stools or even diarrhea. Diarrhea is when you have loose, watery poop three or more times a day. Anxiety may cause people with irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD) to have more diarrhea.
In some people, stress slows down digestion, causing bloating, pain and constipation, while in others it speeds it up, causing diarrhoea and frequent trips to the loo. Some people lose their appetite completely. Stress can also worsen digestive conditions like stomach ulcers and irritable bowel syndrome.
Black, tarry blood in stool – If you notice black, tarry blood in stool, it indicates that your cat has digested blood. This generally happens when your cat has bleeding in the stomach or small intestines. This kind of stool is from higher up in the intestine, such as the stomach or small intestine.
Kittens need to be treated every 2 weeks, from 3-8 weeks old and then every month until they are 6 months old. Adult cats (6 months and older) need to be treated every 1-3 months.
For many cat`s with inflammatory bowel disease the prognosis is good. Although there is no cure for IBD in cats, symptoms can often be managed, allowing your cat to live comfortably for many years.
Watery, sometimes foul-smelling diarrhea that may alternate with soft, greasy stools.
Giardia infection in cats may lead to weight loss, chronic intermittent diarrhea, and fatty stool. The stool may range from soft to watery, often has a greenish tinge, and occasionally contains blood. Infected cats tend to have excess mucus in their feces.
Can I get Giardia infection from my pet? The chances of people getting Giardia infection from dogs or cats are low. The type of Giardia that infects humans is not usually the same type that infects dogs and cats. If you own other household or exotic pets, contact your veterinarian for more information.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Evacuation of faeces, sometimes when she hasn’t eaten. Faeces tend to be in small parts – occasional spot of blood.
ANSWER : A. you should see a vet to check what is wrong. it sounds like problem with large intestine. collect a fresh stool sample before visit

Read Full Q/A … :

Q. Has not eaten in 2 days. Noticed a little blood on the fur on her butt. What can I do?
ANSWER : A. Blood near the rear can be caused by a number of things. Bright red blood in the stool or around the anus can indicate a problem with the colon or anal region such as constipation, tears, illness or problems with the anal glands.

Blood that is dark or black in the stool can indicate a problem with the upper intestines such as the stomach or small intestine. This is usually considered more serious than bright red stool, however any blood seen is cause for concern. If the blood is seen more than once or twice, making a vet appointment is a must.

If your dog is not eating and is having blood in either her stool or vomit, making an appointment with your local vet is best. Illness, digestive upset or problems with internal organs can all cause these symptoms. In the mean time, a bland diet of plain boiled chicken and plain white rice may help to soothe minor digestive upset until you can get into the vet.

Q. Our dog have cancer we had to get blood outside of his lungs now is is going anemic what would be your recommendation that we can do ?
ANSWER : A. It sounds like your dog is losing blood into his thorax. If that is the case, and there is no way to surgically stop the hemorrhage, then your options are limited. Your dogs bone marrow will kickstart to replace lost blood cells. If, however, your dogs anemia is severe, and him manufacturing of red blood cells is too small, then your dog will need a blood transfusion.

Q. My dog had diarrhea and blood would come out but hasn’t had it for a couple of days
ANSWER : A. Fresh red blood indicates bleeding low down in the intestinal tract. If there are no other symptoms and it is just a small amount once or twice then I wouldn’t worry too much especially if your dog is better now. It may have been something that it had eaten that didn’t agree with it. If it is excessive amount of blood or any other symptoms then you should see your vet.
dark red/black coloured indicates bleeding high up in the gastrointestinal tract which is more serious and should be checked out straight away.

Q. Cat is over 13 years old, blood test show anemia, weight loss, increase appetite, thick nails, very vocal, blood test did not show thyroid disease,tre
ANSWER : A. It is possible another metabolic issue could be causing the anemia and weight loss, or a more in-depth thyroid test is needed beyond the basic panel. Anemia can be caused by a number of things including blood loss from internal or external bleeding, failure to produce enough blood cells, or destruction of the blood cells by the immune system. Looking for causes of anemia may help you to find the underlying cause causing your cat’s symptoms. Additional tests such as ultrasound, further blood work and more may be beneficial.

Q. Black Lab has blood in stool. Bowel movements are normal
blood is bright red
ANSWER : A. Fresh blood on the faeces can indicate bowel inflammation and small blood vessels broken. It’s what we call colitis, best treatment is a diet with high % in fiber and some antibiotics to prevent bad bacteria to overgrowth. Your vets will prescribe you the best treatment.

Q. I have two 3 week old kittens that I am bottle feeding. The kittens both have diareaa and there buts are red. Is there anything I can do ?
ANSWER : A. Diarrhea in kittens can be caused by many things, including intestinal parasites (very common in kittens), wrong formula, recent changes in diet (from queen’s milk to formula or from one formula to another), and other gastrointestinal upsets. Their bottoms are likely red and irritated from the diarrhea soiling the fur and skin, trapping moisture against the skin and serving as a breeding ground for bacteria. First, stop feeding the formula. Second, collect a fecal sample to be analyzed by your veterinarian for intestinal parasites. Third, call your vet and make an appointment as soon as possible, ideally the same day. Diarrhea in kittens is serious business and can lead to death from dehydration and loss of nutrients. Finally, in place of formula give an electrolyte replacement solution (like Pedialyte for infants/children) – plain, no flavors, no colors – for at least the next 1-2 feedings. This is not the same as a sports drink. After the 1st or 2nd feeding of straight electrolyte replacement solution, start to add formula back into diet at 1/4 strength ( 1 part formula to 3 parts water), The following feeding mix 2 parts formula to 2 parts water. Then, 3 parts formula to 1 part water. Finally, offer full-strength formula. If the diarrhea continues or worsens with increasing amounts of formula, go back to just electrolyte solution and repeat the process.

Q. Which common foods are poisonous to pets?
ANSWER : A. That’s a great question. As responsible pet owners we need to be aware of food items that can be harmful to our canine or feline companions. Here are some of the most common foods proven to cause illness in our animals at home:

Chocolate: A favorite and irresistible treat amongst most humans, chocolate is considered toxic to dogs. In very small amounts it is usually not a huge issue, but with larger volumes and with darker chocolates pet owners should be concerned. Chocolate contains methylxanthine theobromine, which is similar to caffeine. Chocolate ingestion can cause vomiting, diarrhea, hyperactivity, issues with normal heartbeats, seizures, and in some severe cases, death. It is best to keep your favorite chocolate treats in a good hiding spot and out of reach of your dog or cat.

Grapes and raisins: Dogs should not consume grapes and raisins because of the risk of acute kidney failure. Most dogs experiencing grape or raisin toxicity will begin to have vomiting and/or diarrhea within 6-12 hours of ingestion. Other abnormal clinical signs include lethargy, abdominal pain, dehydration, and tremors. Kidney failure develops within 24-72 hours of the initial ingestion. There are some dogs that do not experience these devastating side effects. It is best to contact your veterinarian or veterinary emergency facility if you believe your pet has ingested grapes or raisins.

Garlic and onions: We often forget that our meals contain these two popular ingredients and will allow our furry companions a few bites or licks. Onion and garlic both can cause a type of poisoning that results in damage to red blood cells, making them more likely to rupture. They can also cause stomach upset and mouth irritation. Look for pale gums, increased breathing or drooling or any vomiting or diarrhea.

Bread dough: Unbaked bread dough is considered poisonous to our pets. The bread dough, when ingested, expands in the stomach because of the warm and moist environment. This can lead to a bloated or even twisted stomach. In addition yeast is often added to our baking products to help get bread to rise, and when this yeast is fermented it produces both carbon dioxide and alcohol. The alcohol produced can be absorbed into the bloodstream and causes dangerous drops in blood sugar, blood pressure and body temperature. Common clinical signs include vomiting or retching, distension of the stomach, weakness and collapse.

Macadamia nuts: Ingestion of these nuts are not proven to be fatal in dogs but can cause them to experience uncomfortable clinical sings, including fever, joint stiffness, vomiting, tremors and difficulty walking, especially in their hind legs. Often your pet will start to feel better after about 48 hours, but supportive veterinary care (such as pain medication) may help ease their discomfort.

Xylitol: The most common ingredient used in sugar-free gum is xylitol, which is a non-caloric sweetener. It is also found in some oral rinses, toothpastes and vitamins. Xylitol and dogs do not mix – it can cause a dangerous drop in blood sugars levels. Dogs will often display signs of disorientation, black tarry stool, tremors and seizures. If severe enough some dogs have developed liver failure. Keep your gum away from your canine companion.

Avocados: Avocados are not actually poisonous to dogs or cats but as many veterinarians can tell you the avocado pits can cause a foreign body obstruction. Avocados contain persin, which is actually toxic to the majority of pet birds. The abnormal clinical signs associated with avocado ingestion in birds include, respiratory distress, inability to perch, liver and kidney failure and sudden death.

Go forth and enjoy your favorite foods, but keep in mind which foods you should avoid sharing with your furry family members. Whenever in doubt, contact your veterinarian for healthy and safe food suggestions.