Biff the Dog in his spiked collar, from P.L.A.Y.'s Spiked! collaboration. A supersized squeaker and sliding hind legs that make him good for tug. Sr. is the larger of the two sizes — Biff Jr. is the smaller one. Nothing to do with senior dogs. Made by hand with a double-layer exterior and reinforced stitching, and stuffed with PlanetFill® filler spun from 100% post-consumer recycled plastic bottles. AZO-free dyes, machine washable and dryer friendly.