Cute puppies! I think you misunderstand that the merle puppies coloring is associated with health issues,,nooooo...If a merle colored dog is bred to another merle colored dog 'that' is when you can run into problems, with "their" offspring.
Since you will make sure they are spayed / neutered, there will be no problem with her, herself.
Did you know that puppies in a litter can have different fathers??? She may have gotten mixed up with an aussie..I have aussies, and that pupper looks like a blue merle aussie
It should definitely be interesting to see how she turns out!
I guess one thing that bothers me tho, is if the breeder has such a 'sick' feeling selling maddie to this man, WHY DID SHE??
I am glad Maddie has a new home that will love her and take good care of her..
Yes, Maddie's mom is from Carmspack here on the board..