sometimes there is just something about certain dogs. it could even be something you just havent noticed yet since you have no dogs to really compare. while I hear the "build" argument all the time..I have actually had more issues with COLOUR. Misty is fine dandy and friendly..to all but medium to large RED dogs. red dogs more then an inch smaller then her are just like any other dog, she has often met 2 dogs of the same size, same build, and same breed, where one was red and the other was not...and in each case she is totally normal with the non red, but went ballistic upon SIGHT of the red one, dont matter to her if its a doberman, a pit or a retriever.

or Happy has issues with certain dogs that I have yet to figer out, Schnauzers are a hot spot for her, she can be totally fine with them one minute and go nuts on them the next, any other breed when she is ok with them once, she is ok with them forever. the one exeption is Macy..Macy is a Heeler/Pyreneese X and as often as Happy has met this dog, and as long as she has known her..she HATES Macy, darned if I can figer out why!