What does Spongebob's pet Gary the Snail like best?

Spongebob's pet will only bark like a cat. I like to eat cookies. The equivalent of a cat on land. Although he is a snail, he wears cloth shoes and teaches Spongebob how to tie his shoelaces. I can play the violin, tie my shoelaces, open the door and have a smart brain. Its mucus will make people fall. I climb on Spongebob's head when I am happy.

The hymn Gary the Snail actually has feet and can bite people. His IQ has surpassed Spongebob, and he is a philosopher.