Why Is My Cat Thin At The Back End? Know The Reasons Here

​Is your cat ​looks thin at the back?

​I know you’re worried. Cats back end is getting thin & you aren’t able to figure out what’s going on.

​Well, in this article I am going to cover this ​wider asked question – ” why​ Is My Cat Thin At The Back End”

Answer may surprise you but don’t worry. My goal is to explain this to you in simple form & show you the right way. Let’s get started

Why Is My Cat Thin At The Back End

So, Why Is My Cat Thin At The Back End? Your cat is thin at the back end probably due to lack of food or frequent hunger. It might also be a possible sign of disease. Check out our full guide to know how to deal with it.


Feed your cat good food like this & this. Watch their weight. If he is getting thinner day by day , you may want to visit to a pet clinic soon.

Cats with Skinny Back

Thinning at the back end of the cat is a common situation. They may have skinny back but still act as normal as they are supposed to. But, a deeper check may show outward signs of problems.

There are felines who are just normally skinny at the back but still drop mass at that location, so it is pretty confusing to tell. In short, there can be skinny back cats but are normal and there are those that aren’t.

For anyone who has raised moggies and lived through their development stages, losing weight at the back end can be assumed as signs of digestive malfunctions. There could be severe ailments lying behind.

While it is best to consult with your veterinary as soon as you see signs you feel you can not ignore, there are some ways wherein you can observe them first.

Most likely they are experiencing any of the situations mentioned ​below.

Hunger or Lack of Food

​The first sign of weight loss​ in a cat is when their behind shows thinning. You will notice that as you feed them, their belly turns up when they are done. Thus, an empty stomach will make the back end appear thinner.

However, not giving them anything to eat for an entire day doesn’t account for the skinny back. Hunger has to be a lengthy situation to cause weight loss and thinning. If the kitten eats regularly but is still losing weight, it could be due to appetite loss or digestion issues.

If your cat shows skinny back but acts normally, most fur parents are confident the situation is not too dangerous. Before bringing them to the vet, make a move with the food and watch how they eat.

Some reasons ​they get hungry are;

  • ​They may have a painful tooth, mouth sore
  • ​They can not reach the food as it is unreachable or other pets in the house left a trace on it (urine, saliva, etc.,)
  • ​The food is weary
  • ​They are too upset or stressed to find the appetite to eat


​Make sure your pet is eating the food you have given. ​Keep them under your observation for few days.

Signs of Diseases

A skinny back is the first sign of some of the cats’ health conditions. Most of the time, these disorders come with more than a symptom. The best way to understand the situation of your tom is to pay more attention to their daily habits.

Some of the diseases may manifest signs and symptoms in cats.

​Gastrointestinal Tract Diseases

The most common disease in cats usually results from intestinal parasites. GI problems are not only inconvenient but they sure are signs of some serious trouble.

Parasites that are a frequent cause of GI problems in cats are roundworms, tapeworms, hookworms, whipworms, etc., A lot of kittens acquire roundworms from suckling milk from their mothers that sometimes may contain roundworm larvae.

Coccidia can be picked up from ingesting small amounts of dirt. Tapeworms get transmitted through cats that eat or sniff fleas or preying animals that contain tapeworm larvae.

If left untreated, GI issues caused by intestinal parasites can make cats severely sick. Getting rid of these freeloaders is rather simple.

The parasite just needs to be identified, usually through a microscopic fecal exam. Then the cat undergoes the appropriate medication recommended by the vet.

​Diabetes Mellitus

When you see a cat that eats a lot, but the energy doesn’t work for weight, they could be showing signs of diabetes. This ailment causes lost calories through urine and therefore is the main reason for rapid weight loss.

​The incidence of feline diabetes​ is considerably low at 0.5% to 2%. But, that could be because they might be underdiagnosed.

The main symptoms of diabetes are increased in the need for liquids and urination. It would be hard to tell on the body weight as it may happen in cats with just the right bulk, but even more in obese ones.

Most of the cats with diabetes have a voracious appetite since their bodies cannot use the fuel supplied in their diet.


Another common disease in cats that mostly affects middle-aged and older is hyperthyroidism. This is caused by an upsurge in the production of thyroid hormones from an inflamed thyroid gland in the tabby’s neck.

Usually, the enlargement of thyroid gland roots from a non-cancerous tumor called adenoma. But, some may also be due to malignant tumors known as thyroid adenocarcinomas.

Causes of hyperthyroidism in a feline are not known clearly, however, they can be contributed by lack or oversupply of certain compounds in the diet. It could also be due to diet and chronic exposure to thyroid-disrupting chemicals.

The rear quarter of the cat is where the liver, stomach, spleen, kidney, bladder, small intestines, colon, and reproductive organs are placed. Therefore, the weight on this side of the cat can express their strength and their health condition.

A skinny back could be because of organ failure because of all the organs situated within this part. But, in such cases, it can only be detected by a medical check.

How To Tell If The Cat’s Back End Is Thin

Weight loss in cats is noticeable​ despite some of them being covered in thick fur. You have to check them out from a different angle to make sure they appear just right or thinner than usual.

If your furball is long-haired, a slight touch to feel around your cat’s spine should tell you a lot. Feel the bones but not to tight. If the vertebrae feel as if there is nothing on top of them, your cat could be underweight. Likewise, when they are difficult to feel, they are overweight.

Cat’s weight has benchmarks depending on their breed. For a grown-up Sphynx, for example, they will appear a thin model with only 9 pounds. They are known to have slow weight gain. Birmans’ weight is just a manifestation of how much they can eat. They can be fat if you let them eat by their heart or average if the eating is controlled.


​Try to observe from different angles. ​Research cats weights according to their breed and ​do a benchmarking.

What To Do If The Cat Becomes Too Thin

​Owning a cat (or cats) doesn’t account as experience enough to tell whether the cat’s skinny back is worrying or not. In most cases, it is always best to consult with the experts.

​As we have mentioned in this article, the cat’s weight loss could be because of plain appetite loss. However, there may still be other causes that we cannot ensure at home.

If your gut tells you it is something serious, some domestic methods can be tried to alleviate the situation. Nevertheless, if they appear to be too thin for a longer period or if they are losing weight rapidly, it could be more than just hunger.


​Cat’s thinning at the back end is non-specific, especially because they have different breeds and each has its own standard weight.

Weight loss could also be associated with aging. With the many reasons cats have skinny backs, it could be confusing to tell why and what to do. The best thing is to always check with the vet. They should know better.

1 thought on “Why Is My Cat Thin At The Back End? Know The Reasons Here”

  1. My cat eats twice a day half a can of wet (Royal Canine) and a scoop and a quarter of dry. He is a younger Cat four years of age and he is quite sunken in his back area. He’s strictly indoors and he gets a few cat treats daily. Any ideas.

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