Tenaj - look under General; I posted something I found about introducing a new cat into the home, but I am sure it applies to any animal.

Did you keep them separated at first?

I am glad you are reluctant to declaw...talk to a behaviourist, try kennel drops or something temporarily - there are a lot of folks here who will have great advice.

Did you post this on Dog General also?

hugs
Catty1