My lovely cat is from the RSPCA she has been with us three years now. Our previous cat had 13 years with us, she came from a local cats rescue. On both occasions we were not asked if we had a dog , as it happens we don't. I think the rescue centre are being very picky , we had cats and dogs living together when I was a child. You need to look else where , perhaps speak to your vet he/ she may be able to help. Such a Shame when you are an experienced owner who can provide a loving home for a cat who needs one ! Don't give up , keep searching and keep us posted. Good luck!