Hello, I have a 16 year old guy. He has not been feeling the greatest. Let me start with a little background. He has been previously diagnosed with IBD, or gastrointestinal lymphoma. No way to know for certain without a biopsy. He has been doing well with his weight, and gastrointestinal issues for a while now. Later, he was diagnosed with hyperthyroidism. This has been almost a year ago. Within the past month I have noticed Behavior out of the ordinary. He is a strictly indoor cat, and he has been sneezing quite often. He has a bit of a runny nose. He has been drinking water in excess. However, this is not a new symptom. He has been drinking in excess for a couple of years. He has also developed what I would call involuntary muscle spasms in his limbs. It is not when he is sleeping, it is at random. It does bother him, but it does not seem to bother him too much. As he will lick his paw after, or shake it. Now, this morning he was sitting next to me, and I could hear his stomach gurgling. He then threw up about 20 minutes later. I am certain his stomach was empty, because it was foam. His diet is limited to YD, due to the hyperthyroidism. Any and all advice is greatly appreciated.