Smart Pet Love Snuggle Puppy Behavioral Aid Dog Toy Reduces negative behaviors resulting from anxiety, such as whining and barking, through natural instinct, not medication Helps puppies transition to their new home and sleep through each night A great crate training tool for new puppies Recreates intimacy with physical warmth and a "real-feel" pulsing heartbeat which eases crying, loneliness and separation anxiety in pets Pulsing heartbeat lasts up to two weeks of 24/7 use with two AAA alkaline batteries (included) Machine washable with the heart and heat pack removed Used for about 1 week while we crate trained our pup. He did however bite the nose (if you can sew, its an easy fix).