thanks, Smiling cat.

that's a good answer. I can call my vet.
I used to be able to comb fleas out of my cats' hair but my eyes no longer see them quickly enough. Now what happens is I get fleabites (from fleas jumping on me while i comb the cats) and not EVER finding fleas on my cats.

Yes, I agree they are terrible poisons but as long as neither of my cats has a physical reaction to the stuff, I'm going to keep giving it to them.

We don't have ticks here thank goodness, and as long as I live on this dead end, I will probably continue to let my cats out because they seem to keep the rat population down.