We cruised for a year with a cat. We modified the area under the 'V' in the v-berth. We put a hooded version under there to keep litter from being kicked out. I wish I would've taught her to use the head. It would've been time well spent. We were always sweeping and it kinda kept me from going barefoot because I hated stepping in it.
Funny story about the cat, she got sea sick all the time. The rougher the
weather, the more puke. We'd measure the
weather by how many piles there were. We'd say "It was ony a 2 puker. Weather was good." or "Man, that was a rough
passage, it was a 6 puker!" Other cruisers got involved in the lingo and we laughed about it the entire coast. My wife loved it...yeah.