3 days.

Experienced and professional animal trainer provide their insights in answering this question :
A. She should be rechecked by your veterinarian. Rule out low (or high) blood sugar as well as DKA (diabetic ketoacidosis). She may require hospitalization, supportive care and close monitoring until her condition is regulated.

How to Identify Common Pet Problems ?

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

It could be that your dog ate more than they could handle or ate too fast, or your dog could have eaten too much grass. Sometimes the cause could be more serious. Your dog could have swallowed something toxic, or it may be a sign of a serious illness, which could require a visit to see your vet.
Hide the Pills

If you`ve ever spent time digging pills out of your dog`s regular food because he won`t eat, then it`s time to tempt. Cottage cheese, cream cheese, liverwurst, peanut butter, and American cheese may all work for hiding the pills.

Recent Vaccinations and New Medications

A visit to the vet can be stressful for your dog, which may cause a temporary loss of appetite. Same goes for the brief inflammatory response they often cause. Neither are anything to worry about, as dogs typically get right back on schedule.

Dogs can usually go three to five days without food, however, this is not ideal. If your dog has gone two days without food, it is highly recommended you call a veterinarian if you haven`t already. More important than your dog eating is their water intake.
Ginger. Ginger is one of the best home remedies for your dog`s vomiting and upset stomach. You can make ginger tea by boiling fresh ginger root in water, cooling it, and giving it to your dog in small amounts throughout the day.
Dogs with diabetes mellitus typically require two daily insulin injections as well as a dietary change. Although a dog can go a day or so without insulin and not have a crisis, this should not be a regular occurrence; treatment should be looked upon as part of the dog`s daily routine.
Not eating + insulin injection = low blood sugar

Due to how insulin works, you shouldn`t give insulin on an empty stomach. It is important that a diabetic dog has eaten prior to receiving insulin. Otherwise, without the influx of glucose from the food, the insulin injection can drop the blood glucose levels too low.

Dogs may go off their food because of changes in their environment, stress, an adverse reaction to drugs, and nausea. Dental problems, pain and internal obstructions can also cause dogs to lose their appetite.
Changes in Appetite

Sad and stressed dogs may also not want to eat or drink. “They may also stop eating their food, but will eat people food,” says Ochoa. So, look for any change from the normal diet and cravings.

Healthy, adult dogs can go three days without food. If they are very young, old or have an underlying health issue, call your vet after 24 hours of no eating. Very young puppies should not go without food for more than 12 hours. They can become dangerously hypoglycemic, especially small-breed puppies.
Although a loss of appetite in dogs doesn`t necessarily indicate serious disease, prompt veterinary attention is important because it could be a sign of significant illness, including cancer, various systemic infections, pain, liver problems, and kidney failure. Dental disease.
Healthy dogs can typically survive up to five days without eating, but only if they have access to drinking water. In extreme situations, dogs have been known to survive without sustenance for much longer, but not without any severe health consequences.
Symptoms of high blood sugar in dogs include:

Increased thirst. Increased urination. Depression, expressed in loss of appetite, changes in sleeping habits, loss of interest in activity, and/or seclusion. Severe depression, as seen in dogs with very high blood sugar levels.

With appropriate treatment and a speedy diagnosis, your dog can have a long and healthy life even after being diagnosed with diabetes. The lifespan of a dog with diabetes will vary massively from case to case, but the `average` time frame, given by vets and medical experts, is two to three years following diagnosis.
A diabetic animal will often be more tired than usual and show an unwillingness to participate in some of its regular activities. Diabetes can cause weakness in certain muscles in an animal, and since they may suffer from malnutrition, they will spend more time sleeping and less time being active.
Balancing insulin and food is like a relay race. The body constantly processes food and insulin between meals and injections. Most dogs do best on a regular schedule of 2-3 meals a day. As a general rule, injections should be given every 12 hours.
Natural treats for a diabetic dog include vegetables, some berries, meat products, and special herbs/seeds. The best vegetables for diabetic dogs are low-sugar and high-fiber veggies such as: Pumpkin. Peas.
Sometimes diabetic dogs don`t eat their full meal, so you will need to adjust the amount of insulin you give. If your pet eats less than half of their meal, you need to give them half of the insulin. Even if your pet doesn`t eat anything, they should receive a half dose of insulin to help combat elevated blood glucose.
Take insulin, but don`t eat: Rapid-acting and short-acting insulin injections should be taken just before or with meals. Your blood sugar rises after meals. Taking rapid-acting or short-acting insulin without eating could lower your sugar to a dangerous level.
If your dog hasn`t eaten for a week, it`s definitely time for an immediate vet visit. Healthy dogs can typically only go up to 5 days without eating anything before they start experiencing problems.
As depression causes many dogs to go off their food, a fresh food can help to entice them back to their normal eating habits and help lead them back to their normal routine. Some dogs might even seem sorry to see the same boring, brown biscuits every day and a change to their dinners can work wonders for their mood.
The symptoms of depression will vary depending on the individual dog and the severity of the problem. There are some key things to look out for, however, including changes in body language during their interactions with people and other pets, decreased appetite, and lethargic behavior.
Most dogs can refuse food for three days before they give in, while others can go up to five days without eating. Your dog can survive without food for three to five days, but it must be drinking water during this time. Some healthy dogs can even go seven days without food, but you should see a vet before this point.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Cat was vomiting for a few days. Took to vet, received anti-nausea medicine 2 days ago. Drinks and no longer vomits, but won’t eat. I’m worried
ANSWER : A. If your cat has been feeling nauseated, it is possible that the nausea, or just general illness is making him want to eat less. However, you can try enticing him to eat with a few tricks geared to cats.

Warming up wet foods or even bland people foods such as plain chicken or boiled hamburger can make food more interesting to cats. Cats tend to go for aromatic rather than flavorful foods, so making the food as “smelly” as possible may encourage your cat to take a bite. Bland foods are also good for helping to soothe upset stomachs, which may still be happening if your cat had recently had a vomiting episode.

However, if enticing your cat to eat does not work, or he continues to refuse to eat any food, it is best to contact your local veterinarian for more care and testing. Cats can become very ill if they refuse to eat for more than a few days, and finding the underlying cause can help your cat feel better.

Q. Why does my dog eat grass?
ANSWER : A. As another user mentioned, dogs can eat grass when they want to vomit. Sometimes, when a dog has an upset tummy, they will eat grass. If you notice your dog eating grass frantically, you can assume vomiting will shortly follow. Grass does not digest and pass normally. If your dog eats too much grass, it can cause serious issues with pooping. Your dogs poop can end up all tangled inside of her, and it can need veterinary assistance to remove it. The same goes for celery, so avoid feeding celery to your dog.

The other day my boyfriend accidentally left the laundry room door open where we were keeping the trash that was filled with cooked chicken bones. She ate one of the chicken bones lightning fast. We had to induce vomiting by feeding her some hydrogen peroxide. After we had fed her the peroxide, she immediately began frantically eating grass because her tummy was upset.

If there is something lacking in your dogs diet, it could be that your dog is eating grass to make up for it. I am sure that my dogs diet is extremely well balanced (I do not only feed her an air-dried raw food-type diet (Ziwipeak), but a wide variety of safe, healthy foods), so when she eats grass, I know that it is because she has an upset tummy.

That is why I think it is important making sure your dog has a very well balanced diet. If your dog is on a low quality kibble, your dog may be trying to let you know by eating grass (or eating poop).

Q. My dog is a golden retriever breed. 1 year 5 months. He vomits his dog food out (happy dog brand). And he is having diaherra with occasional blood in
ANSWER : A. Get the GI upset under control first. Withhold food for 12-24 hours. Allow small amounts of water or unflavored PediaLyte. Resume feeding a bland diet (1:1 ratio of plain boiled boneless chicken and plain white rice). Feed in small, frequent amounts waiting at least one hour between feedings. If the vomiting stops, continue feeding until the stool is normal. Transition slowly to the regular diet. If the vomiting or diarrhea don’t stop, see your veterinarian. Discuss food allergies and food elimination trials. Submit a stool sample to rule out intestinal parasites. Elevate the bowls. If he eats fast, feed small frequent meals throughout the day or buy a special bowl to slow down his eating. Follow the link for an example of a “slow feed” bowl.

http://www.pet360.com/product/61729/kong-slow-feed-dog-bowl

You can also add large stones or balls in his bowl so he has to slow down and eat around them.

Q. I’m fostering some now motherless 5 week old Pitbull puppies. There are 5 of them. How much do I feed them? I give them blue buffalo puppy food by wa
ANSWER : A. It should say on the Blue Buffalo on the back under, “puppies” or some sort of age chart. Make sure it’s puppy food.. puppies need extra protein and nutrients. http://bluebuffalo.com/product-finder/dog/?facets=Puppy,Dog_DryFood#

http://www.bullytree.com/wp-content/uploads/2013/08/Feeding-Chart-Blue-Buffalo.gif – On the back of a puppy-food bag from Blue Buffalo it says underneath 3-5 months, “3 to 20 lbs: feed 1/3 – 1 1/4 cups per day” and “21 to 50 lbs: feed 1 1/2 – 3 cups per day.” Make sure you are breaking that up into at least three meals. Let’s say you decide to feed them 1 1/2 cups per day each, then, you should measure that out, and set it aside. Throughout the day, you should offer at least three mealtimes with that set-aside amount. You want to start with the least amount, and then if they seem hungry (licking the floors, begging you constantly for food, whining/crying) feed them a little more until you get it right. Do not overfeed, and try to avoid underfeeding a well.

Q. I currently feed my 2 year 31 lb Beagle 1 1/2 cups of Eukanuba a day. I was thinking of changing his food, can you recommend something?
ANSWER : A. If you are looking for a higher end food to feed your Beagle, there are many available now in commercial pet stores. Many brands such as Blue Buffalo, Nutro Natural Choice and others offer holistic foods that tend to be more meat based than carbohydrate based. Some brands such as Royal Canin also offer foods that are specific to certain breeds. This means the products tend to have more digestible ingredients in them rather than fillers. They may also avoid some allergenic ingredients such as corn, wheat and soy products which can cause digestive issues in some dogs. However, Eukanuba, Science Diet and others are a good mid-grade brand and many dogs do very well on it.

If you do decide to switch your dog’s food, it should be done so gradually to avoid digestive upset. A routine of 9 days is best for switching over. This involves 3 days of 25% new/75% old, 3 days of 50/50 and 3 days of 25%old/75% new before finally feeding only the new food. Also be advised that depending on the ingredient changes, foods that have different grains or fewer grains in them may slightly change the consistency and size of your dog’s stool.

Q. My 20 month Cavalier doesn’t eat unless I let him eat from my finger, then he eats. Sometimes he will only eat once a day and leave his food.
ANSWER : A. It is possible that your dog is just not satisfied with his current food, or may be a picky eater. There are several things you can try to encourage your dog to eat.

The first step is to remove any additional treats or people food that may be more enticing to your dog than his own meal. If you feel you must give him some form of treat, be sure to place them directly in his food bowl and mixed with his regular diet. This allows him to get some snacks while also “forcing” him to try out his current meal to get the reward.

Enticing your dog to try his food by adding a pet-safe gravy or even a few treats of plain boiled chicken mixed in can help. Be sure to mix the foods thoroughly so he must explore his own food before getting the treat.

Some small breed dogs may also have a hard time with certain bowls and their collars. If there is a metal name tag on the collar and a metal bowl, the clinking sound can sometimes scare off dogs and make them not want to eat from their bowl. Using a bowl of a different material, or removing the collar prior to a meal may help with this issue.

Your dog may also just not be into his current food and may like another variety better. You can try a new variety by gradually switching over a period of 7-9 days, slowly adding in more new food and removing old until it is switched. This change may encourage him to try out meals again, and the slow changeover will allow his body to adjust to the new diet without digestive upset.

Q. My 8mo. puppy eats feces. Wedont scorn him for pottymishaps. He hides feces in his bed.I feed him blue buffalo 2 per day. How do I stop this?
ANSWER : A. A lot of dogs do this, and sometimes it is just because feces tastes good.. sometimes it is due to something lacking in their diet.. but a lot of the time, it’s just fun and tasty. The only way to handle this situation is management. You should be cleaning up your two dogs poops immediately when they happen. Scoop them up, throw them into the woods, or into a can. You cannot give your pup access to the poops.

You could also try adding things to your pups diet. Things like canned pumpkin for dogs (not the pie filling you find in the grocery store, that has way too much sugar in it). Or you could feed your dog raw chews like marrow bones, or beef tendons. You’ll have to add things to his diet in order to find out what is missing from it. If you allow him to continue eating poop, even if there is something lacking in his diet, he will continue eating poop when you’ve solved his diet issue because it will become a LEARNED behavior. This means he will continue eating poop because he learned he CAN eat poop. You could also try feeding him three meals per day. Feed him the same amount of food, but break it up into three feedings per day. This could help him feel a bit more full throughout the day.

Clean up your yard, and clean up after your pups immediately when they eliminate outdoors. Do not scold him, there is no need.. it isn’t his fault.

Read Full Q/A … : R

Q. Hollywood is 15 yrs; he’s been vomiting, not eating much & has had runny diarrehea for 3 days now. Help
ANSWER : A. Given his age and the duration of symptoms, a visit to your vet for an exam and diagnostics (blood work, abdominal xrays) would be the first recommendation. At this point in time, he may require supportive care (fluids, medications) if he is dehydrated and not eating well. If that is not possible, try withholding food for 12-24 hours. Allow small amounts of water or unflavored PediaLyte. Resume feeding a bland diet (1:1 ratio of plain boiled boneless chicken and plain white rice). Feed in small, frequent amounts waiting at least one hour between feedings. Serve it warmed or mix in baby food to stimulate the appetite. If the vomiting stops, continue feeding until the stool is normal. Transition slowly to the regular diet. If the vomiting or diarrhea don’t stop or he doesn’t begin eating again, you will need to see your veterinarian.