Today there were two instances where Milo's right leg joints (don't know which one) made a crack sound, the same sound when you 'crack your knuckles'. From my understanding, when you 'crack your bones' it's just getting rid of bubbles in the synovial fluid between the joints. I may be wrong on this.
It happened once when I was pressed onto Milo's right chest area while wiping him with a towel after a bath, and the other time was when he rammed into my leg. He didn't seem in pain. No yelping, no limping. It was like he didn't know it happened, but I sure heard it!
Is this an indication of bone joint problems? Or is it normal, like it is for humans?