A weight training apparatus for animals includes a leg strap with a proximal face and distal face, at least one pocket integrated into the leg strap, a first interlocking piece that rests on the proximal face, and a second interlocking piece that rests on the distal face. The first interlocking piece and second interlocking piece are positioned on the opposite ends of the leg strap. The at least one pocket is placed between the first interlocking piece and the second interlocking piece and is capable of holding at least one selected weight from a plurality of weights.