A sick cat, depending on the disease it has, may stop eating or do so much less frequently than would be appropriate. This is something that is a serious problem, since by eating less you could lose weight, become dehydrated and even, in serious cases, lose your life.
To avoid reaching that situation, we are going to explain what can a sick cat eat. This can help you maintain your weight, which will influence your health.
Take him to the vet
If you suspect that your cat is sick, the first thing you have to do is take him to the vet for examination and treatment. It is very important since, depending on the diagnosis, you may need a vitamin and / or mineral supplement, or you may have to stay in the hospital..
Your veterinarian may prescribe therapeutic diets (renal, digestive, diabetic, etc.), assess whether they are necessary Supplements and establish the best way of feeding (small meals, adequate textures and calories) according to the case.

A quiet and safe room for you to recover
When you have a sick furry you have to make some changes at home so that they are as comfortable as possible. Therefore, one of the first things that I recommend is that place it in a room where it has its bed, its feeder and drinker and, if for whatever reason it cannot or does not want to walk a lot, also its litter box.
In this room it is important that you avoid making noise, and that you only go to be with the feline and give it a lot of affection and pampering, because if we cause stress and / or anxiety, it will not eat.
Put feeder and waterer very close If mobility is reduced, keep the environment quiet and temperate, and facilitates the sense of smell clearing your nasal passages if you have a cold (smell is key to making you want to eat).
Conquer your feline palate with cans for cats
One way to get him to eat is to offer him cans of wet cat foodDry feed has little smell, and having to chew it often causes the convalescing animal to lose its appetite; however, Canned goods are much tastier, easier to eat and more fragrant..
To make things go even better, it is highly recommended give you high quality cans, that do not contain cereals or by-products, as they contain a high percentage of animal protein that will keep you well fed, and enough water to prevent dehydration.
If he doesn't want to eat, you should try heating the contents of the can in the microwave, or even try other foods, such as Yum Diet for cats, or cooked meat (boneless).
Test to temper wet food a few seconds to enhance its aroma, offering very juicy textures and even 100% meat baby food without onions or garlic. It can help during convalescence. puppy food for its extra energy. It offers small and frequent feedings and always keep some food available.
Take care of the hydration with fresh water and, if advised by the veterinarian, salt-free broths. Avoid prolonged fasting: in cats, more than 24-48 hours without eating increases the risk of hepatic lipidosis.

I hope that these tips serve you so that your furry one keep getting better 
Specific diets according to diagnosis
- Renal: control of match and sodium, adjusted protein, omega 3 and B vitamins.
- Diabetes: high in protein and fiber, low in carbohydrates and fats to stabilize glucose.
- Digestive: high digestibility, moderate fat; soft foods prescribed by the veterinarian may be used temporarily.
If the cat still does not eat, differentiate between lack of appetite (doesn't want to) and inability (wants to and cannot). The veterinarian will decide on tests (analysis, imaging) and, if appropriate, assisted or tube feeding and management with prescription appetite stimulants.
Caring for the environment, choosing palatable foods and following veterinary guidelines makes the difference: with patience and stress control, most convalescing cats regain their appetite and energy sooner.