09-03-2014, 02:15 PM
Join Date: Apr 2012
Location: Arlington, VA
Mentioned: 71 Post(s)
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I think you should start training this at home, if only for poor Ed's sake. Put him on a lead* right before this happens, since you know when it will happen. Then, every time he tries to hump Ed, call him to you, pull him with the lead if necessary, and give him a great treat when he gets to you. Work on his recall all the time, making it very, very rewarding each time. Your goal is to get his recall so good, it interrupts the humping, and to interrupt the humping so many times that he gets out of the habit of doing it.
You'll then want to move all this training outside. You will likely have to start from scratch outside, because outside is so much more distracting than inside, but it will be easier the second time.
ETA: Since you are aware that a certain level of arousal triggers humping, interrupt him before he gets to that level of arousal. Call him to you, pull on the lead if necessary, keep him near you for a little petting until he calms down a bit, then let him go. Repeat as necessary.
*Do not keep a leash on a dog except when you are watching him. Unattended dogs on leashes can hang themselves.