Phil took Harry along to the vet this afternoon to check on his kidney function. Happily, there has been no real change since he was last checked 18 months ago. As a young cat, he has adapted very well to the kidney medication he is on and remains in good health. He refuses to eat the special food for cats with chronic renal failure but he is lucky enough not to have paid a price for it. This means that the behavioural problems we have been seeing do not have a medical cause.
Phil discussed the issues with the vet, who believes that Harry is stressed and also jealous of Michael. He suggested that we try Harry on Clomicalm for a month - it is a tricyclic antidepressant. The hope is that it will break the cycle of negative behaviour. I'm not convinced that it will be helpful in the long-term but I'm keeping an open mind. I was researching the drug online and came across a number of owners asking vets for advice with their pet behaviour problems. Whatever Harry's faults, he has never once in 5 years been aggressive towards us and for that I am truly grateful. I hope the medication helps him.