Since around 9 mo old Russell has decided he HATES puppies (he's now 15mo). Very young and very docile puppies he's okay with, but rambunctious puppies and pretty much anyone 6-10mo or so is his sworn enemy. On a good day such a pup would have to initiate play for him to react, but sometimes all it takes is for him to catch the puppy playing with any dog, or running around. Russell chases them, nips, barks, and if he can corner them he makes a big scary show of loud barking and nipping and bared teeth.
I watch him carefully and to my very trained eye it's clear that he is not really biting, many times he is barely touching the dog with his teeth, but it looks and sounds VERY vicious and scary. And of course, these are puppies, sometimes smaller than him. It's worth noting that some puppies he used to hate and try to 'fight,' but now have grown up a little, he's friends with and even submissive to usually. If it were
my puppy he were fighting with, I would let them work it out, but these are off leash dog park situations and that kind of thing does NOT fly. It's really really embarrassing and already Russell's earned a rep at the park which totally makes me cringe.
Right now I manage this bad behavior by being super vigilant, spotting puppies as soon as they enter the park, leashing Russell and keeping him in a down stay until they leave, or just leaving ourselves. He can relax in a down stay and doesn't seem stressed, but if I let him off he would typically make a beeline for the puppy and try to kick its butt. I hate this, it's embarrassing, it's stressful for me, and it makes our trips to the dog park really not fun - as a result I barely go, but since we can't use our yard it's his only time to run around outdoors. And since I don't know anyone with a dog, it's our only chance to socialize him w other dogs.
My question is, is this something I can reasonably expect him to grow out of? Is it a question of him "disciplining puppies" (9 mo seems a little early to start that)? Is it a social status thing with puppies he perceives as rivals but still within butt-kicking range? I read today that Dr. Dodman considers this predatory behavior, which I thought was a little weird. Thoughts?