Need Help /Siamese

Question
My son took a 2 yr old Siamese cat that had to be shut in a bathroom all day and most of the night because he wanted to play with a cat that was 14 yrs old and sick. He is a sweet thing but will not stop pounding the doors at night even though he is free to roam. He is spraying different areas of the house, even beside his litter box. He has been to the Vet and been on meds for mild UT infection. He was fine for a few days then starts all over...We feel bad for his past experiences and has a good home now but we have to stop his spraying. He is ruining a brand new home.
Any help is greatly appreciated.
Brenda

Answer
Brenda, I would definitely discuss an anti-anxiety medication with the vet.  Siamese have lately been proven to be prone to anxiety.  This is partly because they form such strong bonds with their humans, they feel anxious when separated, even if their owners are just sleeping or otherwise preoccupied.  Prozac is most effective for this problem with Clomicalm coming in second place according to a recent study published in Cat Fancy magazine, but each vet will have his preference.

There is a hormonal injection that can be given that may work in stubborn cases.  It's called megestrol acetate.  However, you do not want to use this longterm.  Cats who use it for two months or longer are highly likely to become diabetic and develop mammary cancer, even in males.  If the treatment will work, you should see improvement within two weeks.  If you don't see an improvement by then, I would discontinue the treatment and try a different antidepressant.

For the spraying, you can use a product called Feliway.  It's available at pet stores and through vets (and online at such sites as ebay).  You wash the sprayed areas with alcohol only, rinse with water, and then spray the area with Feliway.  It contains synthetic pheromones to reduce anxiety, which is one of the main reasons cats spray.