Didn't catch one on a Rap though?? b
I also get them on anchovies on tipups. They are pretty east to catch, and, boy, they are fun!
I found that cats are very quick to drop a bait on a tip up. If you are not right on top of them and set the hook within the first 10' feet of line they take they drop it.
Strange, I use quick strike rigs so they kind of have a really good chance of hooking themselves, but usually they run of a hundred feet of line before I get to them. They do not seem to me to be fussy at all with dropping the bait. (then again, the quick strike rig...)