Don't worry about the claws, especially if the snake eats the prey animal head first. All the legs fold neatly back when swallowed and those pesky toenails get digested although with the rest of the animals, bones and all.

Given that, I sometimes will stop feeding if I'm feeding multiples if say, for example, my bp eats her 2nd mouse butt first and it "looks" painful to eat, but then that probably just my paranoia, hehe. =)

And like the others said, if you do not notice any symptoms of respiratory infection, "extra" yawns are probably just that - stretching, still get the jaw back in face, it feels good, etc. =)