Jaw cracking?

Zeke's jaw is cracking when he does his big yawns, one big loud cracking sound each time .

It started a couple of days ago, but he's still eating fine, he's had tripe sticks, denta sticks no problem? He's not wincing when I touch his jaw or anything, I looked inside (as much as I could see - not much) and doesn't look like there's anything obvious there.

It sounds awful, and makes my jaw hurt just hearing it! The sound is almost like when your neck cracks?

Does anyone have any ideas what it could be?

No idea, I'm afraid.

If it were me (worry guts) I would get him checked by the vet.....

x0x