Why is my senior cat struggling to walk with a lump on his side?

Question

My old kitty was healthy and active until four days ago. Now he is meowing sadly, having some difficulty jumping and walking. I felt an elongated swelling near his rear most rib cage on his right side. I felt and pushed a little with no pain reaction from him. Pet's info: Cat | Havana Brown | Male | neutered

Dr. Melanie, BVSc MS · Accepted Answer

Poor Grady! Unfortunately, this swelling could be due to a malignant tumor, especially if he's an older cat. The difficulty jumping and walking could be due to arthritis. I would have Grady seen by a vet today or first thing tomorrow. The cause of the swelling needs to be diagnosed so the vet can decide if there is any treatment available for him. Should he have arthritis, the vet can prescribe pain medications for him. Please do not give him any human pain medications, as many are toxic to cats and are fatal if given.

Why is my senior cat struggling to walk with a lump on his side?

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