The Urushioil from the plant can stay active on inanimate objects for several months, so it could be on a rake or yes your cat could brush up against it and you touch the object and voila! You can try bathing in colloidal oatmeal to help with the itching as well as calamine lotion, benadryl cream, Ivyrest, I don't think one is any better than the other. If it's around your eyes or "where the sun doesn't shine" you may need a steroid dose pack. Just remember, it is NOT spread by the fluid filled blisters breaking, it's where the oil touched before you washed. It takes longer to go thru thicker skin in parts of the body so appears to be spreading!