blue and red heelers dog was let out by accident and wrong stud got to her

depends. if the dog is registered as a cattle dog only then yes but if specifically says a color then no. A red doberman is still full blooded no matter what color the parents are. Depends on the specifics of that breed.

Full blooded but a little inbred-possible physical and mental problems, but occasionally done successfully by show breeders who know pedigrees inside and out. If you are sure they had a breeding, call your vet and see if there is anything he could do to end the pregnancy without spaying the female

same breed still full blooded x breed. And no there won't be any problems with the puppies. That is after all what a full blooded is inbred inbred inbred. until they get the same look over and over. and then they inbred some more.

No not really that is why basset hounds are not pure breeds because of all the inbreeding.