If you can't see a foreign body in the pad, try manipulating each toe individually,if there is no reaction from the dog ,press the pad firmly ,to see if the foot is bruised.Still no reaction ,try flexing the leg [bringing the foot back to the underneath part of the pastern], holding it for a few seconds then letting it return to its natural position,still no reaction?
The problem maybe higher up possibly in the shoulder,press your thumb in the muscle just below the shoulder does the dog react? Can you stretch the dogs leg out and right back without any reaction from the dog?
Is there any sw