Thanks for doing a post like this. And thanks for not showing any graphic pics. I had a dog i found 6 years ago she was a little little pitbull mix. I named her Pennywise like the band not the creepy clown.
She was deaf and abused for sure but so happy always. She had her hearning taken from her by whoever had her.
I found out they do this so the male dogs can come behind them and rape them. If a male is dominated by a female in heat the male will not fight well or at all. She passed away while i was giving her cpr and the vet was getting an iv. Be vigilant abused dogs are prone to heart attacks and for some reason anaphylactic shock later in life. It is either peacefull or a horrible death for them far worse then even fighting. Pennywise died with a strange smile on her face but was suffering termendiously. This broke me since Dogs stay loyal till the end.
Godbless and hope i helped in some way.