I've known for a long time that the 3 youngest kitties are allergic to something. I assumed it was flea allergies, but I'm becoming convinced it's something else...poison ivy. I know that cats normally don't have reactions to poison ivy, but they're free of fleas and still there's itching, and one is starting to chew on her paws, maybe the second one is also. I can't think of anything else it could be. So I'm starting to get as much of the P.I. pulled up as I can. I worked on it some last year, but with all the rain, it's really taking off. Just out on the property, of course. The fenced-in yard is P.I.-free and has been a long time. What a job! I'm also convinced that the cats transfer the oils to me when I pet them or touch them. I had a reaction a while ago and knew I didn't go anywhere near P.I., and it's happened before.