Re: "Loving Brazilian Mastiff" on CL.
I think it depends if they are bonded with someone or not. I would be much more leery taking a dog from a home where she had been cared for, then had to abruptly leave . Our rescue Ziva was found wandering the streets and was then at the shelter for about 48hrs. Once pulled from the shelter, she was fostered at a couple of very capable Fila handlers but never had time to bond, plus they discouraged her bonding to them because she would be moving on.
We picked her up in New Orleans, I had a bag full of chicken hearts and courage that to this day I don't know where it came from. I gave her a heart and then put my face down right there with hers. From that moment on we have been bonded. It took a couple of days but her and Debra are inseparable, except Ziva knows that every morning we have to walk Debra(babysitter) to her truck so she can go to work and make kibble money.
She has a decent temp. I watched her temp get stronger as the bond got deeper. I always joke that it would be Ziva that I would pick to defend me over Cane. She gets pissed really quick. However, Cane is such a physical specimen, there is not many people that could toss him off.