When I play with him, he melts my heart by showering me with kisses at the end of every recall. He makes me laugh and laugh.
Prior to this week, he seemed a bit subdued or worried when I took him out into the meadow without his siblings. This week, he seemed much happier. He was truly a goofy puppy as he ran through the flowers.
In terms of training, we worked on three things this week, all designed to help him with his "issues". First, we are working on helping Hachi be comfortable wearing a muzzle. Wearing a muzzle will be the first step in having Hachi be loose in the house with the Duo. At this point, he can wear it for a couple of minutes without pawing at it. He can respond to verbal cues while wearing it and walk on a leash for about 30' while wearing it. The second thing is teaching him that R getting a treat always means that he will get a small jackpot of treats - to condition him not to resource guard. And the third is something called "engage/disengage", which involves him learning to first look at and then look away from things that scare him. That helps him not to get obsessed with scary things.
And, of course, we "worked" on him playing with his siblings outdoors. That is simply wonderful.