Most animals get extremely confused by very loud amps. I remember one time I was jamming in my basement with my RK hooked up to a 4x12 and a 2x12 and I had it cranked loud enough that hitting a low chord would cause the entire house to reverberate for a second or two after muting it. Anyway, I was using a super long patch chord, and I was playing whilst standing outside on my patio, I was just chugging along to some metal stuff, and my cat was running around trying to figure out where the sound was coming from. She kept looking behind her or into the sky with this horrified look on her face, and finally she just booked it into the backyard and up a tree. It was pretty funny to watch.
Also, if the cat is in the room, and you slap a clean chord real quick and loud, just watch how fucking high they jump in the air :lol: