Due to the restrictions placed on pitbulls, and the fact that pitbulls are in the largest numbers in animal shelters, many shelters have stripped dogs of their breed so as to disguise the pitbull dogs among the other dogs. The shelters see this as giving pitbulls a chance at adoption when potential adopters cringe an the notion of adopting an aggressive breed dog.
This behavior of disguising the breeds of dogs in animal shelters make it more difficult for owners of lost dogs to find their pet. The breed of an animal is the greatest descriptor for identifying an animal.
The fact that an animal shelter disguises the breed of an animal makes you wonder what else they are hiding.