When I was developing software for animal shelter management, one of the most common requests from our users was to all them to use “mixed” as a primary breed indicator. I refused, knowing that using that term was just an excuse for the user to not identify the breed.
I still feel that way; however, I have to admit that in my early days breed identification was much easier. Something happened since then to cause pet owners to randomly breed dogs into new breeds that were difficult to determine the original breed that they arose from.
One unfortunate outcome arose that most of the dogs had phenotypic characteristics of a wide, thick head of a pitbull, thus exasperating the problem in which half of the shelter’s animals were described as pitbull mixes.
At this time, sterilization is still the best answer to pet overpopulation. Pitbulls have led the way in the problem of shelter overpopulation. I’ve always believed that any breed that overwhelms a shelter should be identified as the breed that pet owners would be forced to spay/neuter.