First off -- I love dogs.
Second -- I love climbing.
BUT having said that, I really think there are times when the two should not mix. In congruence with DFA, a lot comes down to the owner. Yappy dogs are no fun to listen to while climbing, and often the owners think it's cute and perhaps adoring.
At the crags, sure, dogs can be tolerated for the most part, and to mirror DFA's point, the dog should be pretty much sleeping. I have had someone dog come over, pick up a piece of MY webbing, carry it over to the shade below a tree, and commence chewing. By the time I found out, I was pretty much convinced that I was out the cost of the pre-sewn, BUT the fucking owner and her friend thought it was truly funny. I should have asked for ten bucks, but I was too pissed off and left the area.
Alpine, dogs have no business being there. I have seen ignorant fucking people bring their dogs up to very sensitive alpine environments and seen them tearing up the fragile flowers and soil while engaged in pursuit of wild birds, causing them undue stress and burning their energy stores off. Again, no leash and the couple found it endearing and exciting. This time I said something, not being nasty, just explained what was really happening there. Their reaction = clueless and careless. Dogs can have a large impact on the wilderness, hell we do enough damage, do you really need to bring your dog into the alpine??? Pick a nice trail, put the dingo on a leash and pick up his steamers and dispose of them properly.....