Rescue Remedy is great. It calms cats down. I tried sedatives with Casey a while back. I brought Tucker home from NYC and all he did was pounce on Casey. The sedatives changed Casey and I didn't like it at all. It made him very sedated to the point where he'd hide in a closet all the time. I finally realized that Tucker had to find a home with no other cats. I placed Tucker with friends of mine in CT. It was then that Casey came out of his shell and didn't need the drugs anymore.

I'd try the Rescue Remedy and Feliway first. Good luck.

Breeders really piss me off when they do stuff like that. My Munchkin, Shorty, spent the first year of her life in a cage with no interaction with other cats or people. The mad scientist breeder was trying to show her in a cat show. She was doing very poorly. I offered to take and socialize her. She is now mine and is a totally different cat. She loves being a lap cat and being around other cats. I hope that breeder rots you-know-where.