My 9 yo cat has CRF. I've posted about her before, but it's been quite awhile. She is very skinny, and I'm trying to get her appetite up. The last time I saw the vet he suggested giving her viamin B complex. He said I can just buy it at the drug store. So I got some, but I am now concerned about how much to give her. I got liquid and put it in her canned food. She doesn't seem to mind it at all. Each dropper full is 1 ml. She is about 6 lbs or less. How much is too much? I seemed to get an incomplete answer from the vet. Is there a danger of overdosing? I heard that since viamin B is water soluable, it passes through the system so the danger of OD is very slim. Is this correct?