Pouncer,may have landed awkwardly,or more likely,may havesomething stuck,in his paw pad,that is causing him,pain.If you can loo,at his paw,see,if there is anything,likea puncture.This happened,to my Pouncer,and it turned out,that she knocked over,a glass,and picked,up,a tiny sliver,of glass.After a trip,to the White Coats,and 45 Dollars later,she was better,this was in 1984,I imagine,that it is a lot more,now.Good Luck,on Pouncers Paw.