You have 2d- 3rd- 4th-hand information that your breeder's dogs (not necessarily your specific dog) may have been abused by a man.
Uh....unless you have PROOF, you have no case. Buyer beware.
I did not go into the details, because it would have been too long of a post, but I got this information from a woman who bought an adult dog from the same breeder. This woman bought this dog while knowing the breeder's dogs had been abused by the breeder's boyfriend at the time. The breeder herself informed this woman/buyer, but I wasn't so lucky... No need to be harsh...

I was simply soliciting input as to how people would act or react in this frustrating and heart wrenching situation... And after beating myself up - no need to it for me - I came to the conclusion that there was no way I could have known this went on, unless it had been disclosed to me. Yes, I thought the dog I was buying was overly shy, and when I brought her home, she had noticeable adaptation problems, but it's nothing I could of assessed clearly beforehand, while coming up with a diagnostic of this dog's behavior, in 2 visits of a couple of hours at the breeder's. And trust me, I grilled the breeder with questions, and she had an answer for everything. I had thoroughly researched this particular breeder, and she was referred to me by a family member. Nobody is immune to trusting someone who seems to have the best intentions and ethics, but who in turn misleads people around them...
Well... Like cshellenberger stated, if you have no proof and facts, then they'll just take it like you said as "hear-say" and you'd wind up spending more money trying to fight a fruitless battle.
If it were me, and I spent $1,000 on dog that I believed was emotionally traumatized and scarred for life, I would contact the breeder. I would confront the breeder in a non-confrontational manner and just express your concerns for your dog's mental health... See what the breeder has in response, then maybe offer up that you've heard some rumors that other dogs have been abused... But I would make sure to not sound condemning and as if you're pointing the finger and accusing the breeder of abusing his/her dogs...
That's just me, and maybe that's not an appropriate approach... but other than that, there's really nothing you can do...
(BTW: Donatello is a recovering abusee.) : )
I think what you are suggesting is a good approach! In the first weeks I had my dog I was so overwhelmed with the problems I was having, that I was in constant contact with the breeder, but after a while, she stopped contacting me, leaving me on my own with my worries and issues... After the shock of what I got myself into passed, I rolled up my sleeves and got help and resources elsewhere, and I'm proud to say that I have a completely different dog now - even after only 9 months! It was a lot of work though, and it's not over yet, but it is oh so rewarding to see her progress and how she is coming out of her shell!
But based on what I just said, I doubt the breeder would offer me any valuable assistance or wrongdoing admittance... And it makes sense now that she distanced herself from me, since she clearly knew why the dog was acting like it was, based on the environment it lived in for 2 and a half years! I guess I need to determine if I need to contact her at least once, to get some things off my chest. And I would do so, in a non-confrontational, but nonetheless direct manner. I'm not pleased to have been taken for a fool!
