My Cat Is Holding One Front Leg Up, Not Wanting To Put Weight On It. How Do I Know Tell Whether To Take Him To The Vet For Xrays Or If It Is Just A Sprain? He Did Flex It At A Toy But Then Pulled Back.

First examine his paw and see if there is anything lodged in the paw. Either in one of the pads or in between the pads. If there is nothing in the paw you should probably take him to the vet. It may only be a sprain but it may be a broken bone as well.