I'm going to tell you about a big source of stress for me. From early in our time with Hachi, we noticed his shyness toward both dogs and people. In response, we decided to try to socialize him as much as we possibly could. We also noticed resource guarding against other dogs almost from Day One - which means that he would try to scare off dogs who came near his food or treats. Again, we hoped that we could deal with it using some methods suggested by our trainers.
As we worked on these issues, we also came to love Hachi. All of his "bad" behaviors came from fear - probably due to his early scary experiences living on the street, his mom's stress level trying to care for puppies without a home, the craziness of living in a shelter for a while, and due to genetics. It is very hard to be angry with a living being who is behaving badly completely out of fear.
Until quite recently, we thought that things were going well. He has totally come to love playing with other dogs and to be very sociable with them. He seemed less hesitant to meet people. And, his resource guarding became rare.
Fast forward to the past week - for some reason, almost everything has gone south. He had a horrendous vet visit where he was so scared that he lost control of his bowels. He resource guarded at two dog classes last week, which means that he snarled and scared off puppies who were interested in his treats. His behavior appeared very scary but he didn't actually touch the other dogs. Then, we tried to have visitors at our house but Hachi spent their entire visits staring at them and intensely barking at them.
On one occasion while a visitor was here, Hachi launched himself at R in a fury of snarling. There were no injuries except that we were deeply shaken. We believe that Hachi was guarding treats that were in the room. He was more prone to do that due to the stress of having a visitor in the house. As those who have had to deal with these kinds of issues will know - it's called "trigger stacking".
To be fair, I must mention that our Duo gets along with Hachi beautifully 99.9% of the time. They still snuggle with him daily. So do we. Hachi is so deeply attached to me and the Runner that it makes my heart hurt.
He is being neutered on Friday, and we hope that might help. Moreover, we are working with two good trainers, and we'll follow their suggestions. But the future is a great big unknown.
I am telling you where things are with Hachi so that you know that life with our puppy is not even close to perfect. He's still incredibly sweet 99.9% of the time. But those outbursts of aggression have shaken me up badly. I hope that we can help him but I'm not certain that we can. Aggression in such a young puppy is really scary.
Especially when you love that puppy.