That is exactly what I was going to suggest for Willow. I am also asking if he thinks we should check her potassium levels. Not sure what B vits are excreted in urine but I think she needs them supplemented. The other thing is, After all the trouble I go to to try to get Fortekor in her, I think she is one of those cats that just turns into a zombie with it so have to weigh up what is best for her. I told OH that earlier in the year, the vet suggested that if she won't take her meds, monthly vitamin jabs are the alternative but won't prolong her life; however they will make her feel a lot better. OH refuses to compromise and said we can't lose our baby as she is family.