Years ago a boyfriend of mine had his beautiful, loving and much loved black lab stolen. The boyfriend was a doctor and he was heartbroken to lose his dog, but he was devastated by what he thought probably would happen to the dog. He knew that large breeds were used for medical experimentation since the size made them most nearly like a human body. They were stolen, then at least, to sell to those laboratories. I don't know if this is still done, I hope and pray not.
This happened over 40 years ago, and my heart is hurting now writing this. I loved that dog, he used to love to swim with me and tow me around in the surf.
Sorry for the OT