Squeaky Toys

When dogs in the wild hunt and kill prey they typically shake it back and forth until the animal takes its last breath and then they eat the insides of the animal first.  So, when you have a squeaker toy that is constantly being shredded, your dog thinks that it is killing the animal.  A dog that has a high prey drive tends not to play nicely with others, and should not have a squeaker toy of any sort.  This reinforces the behavior unnecessarily.