How do I change my pets headshot? I heard it was glitched, but isn't there another way to change how it looks?

Its bugged for everyone they don't work right now.There isn't any way to change it at the moment.

so theres no way to change it without the option?

Nope headshots only work one way right now and it's bugged. It's been like this for awhile and no other options are set for it sadly.