Teaching my cat how to use the toilet - Day 2

Charlie and his new feline siblings, Boston and Blitz bid sweet adieu to their litterbox and are now using the main floor bathroom as their 'humble commode'. This is Day 2 and already the cats are peeing and pooping in their new toilet. The toilet has a large, shallow, plastic bowl secured with duct tape.

Since they're doing so well with their new toilet, I will be placing a flat plastic 'board' with a 3" hole cut out at one end over their litter tomorrow. We'll see how this works.