My older cat eats a lot but is still skinny. Why is he underweight?

I would recommend having some blood work performed on your cat. Hyperthyroidism is a common disease in middle aged to older cats that causes an increase metabolism so cats are often very hungry but unable to gain weight. I would also recommend having your vet check a fecal sample to ensure that Koda does not have any intestinal parasites as this can cause weight loss as well. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

I would recommend taking Oliver Paul into for an exam by a veterinarian. They can do a full exam, and a geriatric blood work panel. They may also take his blood pressure. High blood pressure can cause weight loss in older kitties. It can also cause eye problems. Another common and treatable condition in older kitties is hyperthyroidism. They get benign (non-cancerous) tumors on their thyroid gland that causes them to produce too much hormone which up regulates their metabolism. They will eat a lot and continue to drop weight. A veterinarian can get Oliver on a plan to recovery! Thanks for reaching out to Petco Pet Education Center, formerly Petcoach!

Weight loss coupled with a normal or increased appetite can be a sign of diabetes or hyperthyroidism, to name a couple of possibilities. I recommend getting Felix seen by your vet as soon as possible for an exam and labwork to determine the reason for his weight loss and get him started on treatment.

Thank you for submitting your question regarding Jasper. I agree with the concerns for a thyroid disorder. I do recommend that he sees a veterinarian. Blood work and urine testing will likely be needed to reach a diagnosis. Hyperthyroidism and diabetes can both cause an increased appetite with weight loss. Unfortunately, there is not a good recommendation for at home care. I hope this information helps!

When an senior cat is eating more frequently yet losing weight, this can be a sign of hyperthyroidism. With hyperthyroidism, the thyroid gland is secreting too much hormone which causes an increase in the pets metabolism and subsequent weight loss. Have your vet check Hopes T4 levels to see if she is hyperthyroid and in need of medication to help stabilize her hormones so that she doesn't continue to waste away. This is easily diagnosed and treated with medication (i.e. Methimazole). Your vet will also want to run baseline bloodwork on your pet to make sure no other disease processes are there.

I can certainly understand being frustrated at being told to take Felix into the vet, but there are medical illness that would cause him to eat heartily and still be extremely skinny, and those can only be diagnosed by a vet. These medical illnesses include diabetes, kidney disease, dental problems, feline inflammatory bowel disease, hyperthyroidism, FIV, FELV, intestinal parasites, or even cancer. To diagnose these requires a blood test, a urinalysis, and possibly x-rays. Having Felix seen by a vet is the only way to definitively know what is causing his hearty appetite but extreme skinniness, and that way Felix can be treated so he can gain weight. I will give you some resources that may help you afford a vet visit for him. You can see if your vet accepts payment plans, if there is a low cost clinic in your area, or you can apply for Care Credit online. There is also an organization called Red Rover that give grants for treatment of sick animals, and you can see if you qualify for one of their grants. Best Friends also has a list of resources that offer financial assistance on their website. http://www.humanesociety.org/animals/resources/tips/trouble_affording_pet.html?credit=web_id91754962 https://www.redrover.org https://www.carecredit.com http://bestfriends.org/resources/financial-aid-pets

Tori does look a little thin. It is very common for the physical exam to normal but there is no way the vet can tell what is going on inside with the function of the internal organs. So, if lab work was not done, I suggest that as the next step. Cats, as they age, typically get one of three diseases: 1. kidney disease, 2. hyperthyroidism and 3. diabetes. All of which can cause weight loss and all of which can be easily detected with simple blood testing.