Weak back cat legs, walking on hocks?

My cat is 9 years old and has recently been walking on the hock part of his legs. He has lost a lot of weight, but has beeen eating like normal. He slips when he jumps down from places and avoids jumping up anywhere. I also suspect that he cannot go up the stairs anymore. Previously, he was overweight, but always active. I was wondering what might be wrong with him and how I can make it better as he is a very loved companion.

  • Vetinfo

    By: Erika Raines El Segundo, CA

    Replied on 04/19/2011

    Your cat may have diabetes or hyperthyroidism, an overactive thyroid gland. Both of these conditions can cause severe and sudden weight loss, even when a cat is consuming a normal amount of food. Cats with hyperthyroidism often develop an abnormally large appetite as well and try to eat anything nearby that they perceive to be food. Diabetes can also lead to an increased water consumption and increased amount of urination. Both of these conditions can lead to weakness resulting in a cat walking on their hocks. Your veterinarian can diagnose both conditions by simple blood tests and will be able to provide treatments to control both conditions.

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