K&H Pet Products Mother's Heartbeat Puppy Crate Pad, Medium; Help relieve a puppy’s stress and separation anxiety with the K&H Pet Products Mother's Heartbeat Fleece Puppy Crate Pad. This crate pad helps recreate a mother’s heartbeat. It uses a special heartbeat device that can be removed from the top pocket of the crate pad, which allows you to put the pad in the washing machine. However, the crate pad is designed to help stop your puppy from reaching the heartbeat device. It’s crafted to fit different brands of crates, and includes a bottom that helps prevent slipping and sliding. Plus, the sleeping surface is made of nylon with vinyl backing to help protect the pad from accidents and spills.