Join Date: Sep 2014
Dogs Name: Maverick and Kya
Titles: GCH, BH, Dock Diving, Agility, Rally, and of course Supreme bed destroyer
Dogs Age: 4 years and 20mo
Gallery Pics: 14 Visit Gretchen_Red's Gallery
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I kind of agree a little bit with everyone here, we don't know your experience with dogs or even dobermans. When I speak of aggression, my dog is puncturing something and someone else is going to the vet or the hospital for stiches. When I say my dog "lashed out" that usually means he lost his $#!+ on something by barking and biting but not hard enough to even cut skin really. It's more of a "I'm showing you I'm the toughest one around and don't mess with me or this will get worse". Usually this means they're in a fear period, instead of flight, they have chosen fight. I'm going to attack them before they attack me.
Is you mixed breed a male or a female?
What did you do when he went after your other dog? What did you do when he went after other people? What did you do when he went after you? I want to know the situation, was he on lead, what was your first reaction as well as what you did after that.
This is pretty typical behavior for the age. Taking his balls off at this point will only exasperate the situation so DO NOT listen to your vet. Do hormones contribute to this behavior? yes, but hormones will also help to get them out of this behavior. If you take away his hormones while he's in this state, you stand a high chance he will never leave it. My male went through a similar stage and I'll be honest it took probably 1.5 years of hard work to break him. Most of it involved positive training, bringing his focus to me with high value treats, strangers and other dogs become a good thing, especially when you're super hungry because your meals now become training sessions. I will say that the last time he broke from me while at IGP training to attack another dog, of which I, one of the few females in the club, had to break up the fight (eye roll), that was a very bad and ugly day for him. I won't say what I did but you can PM me and I will.
As far as him lashing out at you, was it due to frustration because he wanted to lash out at something else and was redirecting at you? At a very young age puppies will start testing you and that is the best time for you to let them know that you WILL NOT put up with that kind of behavior. I grab their collars and scruff hard and fast, I hover over them and give them a few firm, loud "NOs!" while I look them straight in the eye. I don't let go until they've calmed down (this advice will likely ruffle some feathers). But a 10mo. old is a whole other situation, you can get seriously hurt doing that. You need to bring in a professional. I'm not going to advise a behaviorist. I've worked with a great one but as others have said there are some not-so-great ones. Instead I will ask you where you live and I'll check around to see about some good trainers in your neck of the woods, feel free to PM me if you prefer.
Lastly, please take this as a hard lesson learned and support a reputable breeder next time. They are worth their weight in gold and they won't leave you hanging high and dry.