Why is my cat losing hair and weight, eating more, and not playing?

Cats that are losing weight despite eating often have a thyroid condition although there could be other reasons like diabetes or kidney disease which are also common. I suggest you have Simba to your vet for an exam and some blood testing.

This isn't normal. Coreilli could have a serious disease like heart disease, diabetes, hyperthyroidism, kidney failure, or even cancer causing her symptoms. You need to take her into a vet first thing in the morning.

Poor Little Sarge. It could be she has a medical condition like hyperthyroidism causing the hair loss as well as the increase in drinking and weight loss, or she could be suffering from something like a skin infection causing the hair loss, and a medical condition like diabetes causing the weight loss and increased thirst. I would take her into the vet for blood work or a urinalysis. The vet can diagnose what is causing her symptoms, and can teat her. I hope this helps!

Cats who are thin despite eating well who also have areas of baldness can be suffering from an endocrine disease called hyperthyroidism. I recommend getting his thyroid levels tested by a veterinarian who does this type of testing.

Hi and thanks for posting on Petco Pet Education Center, formerly Petcoach! Hair loss can have many causes in cats- skin infection such as a bacterial infection, allergy such as to food or a flea allergy (especially if Simba is not on any flea preventative) or fungal infection like ringworm can all be causes. Sometimes anxiety can cause cats to lick off their fur but this is typically a diagnosis that is made after all other health conditions are ruled out first. The weight loss could be due to due to simply eating less (this would be a good thing if Simba was previously overweight). Of course, weight loss can also be caused by many different underlying health condition such as certain infections, hyperthyroidism, liver, kidney disease, certain cancers and other endocrine disease. I would recommend Simba see his veterinarian soon for an evaluation. Your veterinary may take a skin scraping and hair sample from the area of hair loss and may recommend running blood work or other diagnostics as necessary. I hope this helps!

IF she isn't eating properly and losing weight, there is definitely something wrong with her, if she eats the wet food with great appetite, then the dry food must be the issue and that could be either due to a teeth disease or a partial GI blockage. either way you need to take her to the vet ASAP, she will need to be checked, especially her mouth, if nothing unusual is found during the physical examination the next step will be a blood test to try and find out what is wrong.

Sudden weight loss is always a very big warning light that should not be taken lightly, it's usually a sign of an internal disease that needs to be investigated, i strongly recommend taking him to the vet in order to get it checked, he will need to have a blood test done and possibly an xray as well in order to attempt to diagnose the reason for these symptoms.