My 13 year old seal point has become more verbal. He presents himself during the day in the kitchen and sometimes near his feeding area and meows loudly, consistently dialoging with us. Randomly, elsewhere in the house, he will go into that gutteral crying out. At times, during the night, he wakes us up with licking fabric. We have responded to these behaviors with feeding him and he does eat. His bloodwork is good. Although we feed them prescription I/D (sensitive stomach), I feel he is missing something from his diet. Any suggestions?