ALmost every one of the toys Kanan has that has a squeaker he has isolated it and ripped it out of the toy.... I think I've repaired each one of them a half dozen times each. I use different colored thread so I can keep track of the repairs. It's comical.
And yes, when he gets a toy that doesn't have a squeaker or grunter in it he searches with his front teeth up and down for it, then ignores it and goes back to the squeaker toy.