I get too lazy as it's annoying to go in the toilet in. (funinthecloset.com)
Gradually make the hole bigger until your cat is going in the toilet bowl. (pets.webmd.com)
I started holding my first daughter over the potty at around 6 months whenever I thought she had to go and by her first birthday, she was telling me when she had to go because she preferred going in the toilet. (babycenter.com)