A pet collar is used to control your dog & cat when it is escaping and trying to escape. There are two types of pet collars: buckle and no-pull. No-pull collars are helpful for dogs and cats that have short noses and can be hard to handle. Buckle collars work by putting pressure on the neck, while no-pull will redirect your dog’s and cats attention back towards you. No-pull collars are best for small dogs and cats.