Just adopted a puppy two days ago she is a black lab and blue heeler we believe!? Kenya the puppy has been amazing up until this morning she will eat out of the kids hands comes when called etc.. this morning we were in the yard and My three year old went to take a toy from Kenya and she GROWLED at her. About an hour ago i took her by the collar gently to get her off the couch and she totally growled at me also.... I don't want to give her up but I am concerned with her around my kids.. ANY SUGGESTIONS!!?