How old is Boo? I had a cat (coincidentally, named Boo too!) and from the time I got him at 3 months old, until he was almost a year, he was a slasher. I am serious, my arms from hands to elbows were torn to ribbons.

He finally outgrew it, but he had a little "attack" trigger, and I had to be very careful not to trip it. The trigger was touching his legs or stomach. Petting him on the top of the head or back was OK - sometimes he would try and get me then, but I was in a better position to move my hands away.