Mine is simpler: Bucky Buucky... Bucky, BUUUuucky

But it's with an old-timey warble. Never fails to summon him.

After years of getting him to come to us by singing the Bucky song, I realized that if he comes to us because he likes the song, then he might want us to keep singing it. So I tried that, and he purred louder.

We had another cat, Sasha. Her song was like SASHASASHAsashaSASHASASHAsAsHASASHASASHASASHASASHASASHA. It suited her. Our new cat, Agatha, doesn't have a song yet. I guess we should come up with one.