I only have one human son, but last night, Jax met my son's Mal (Westin) for the first time. We went to the DP first, let them meet, and worked them. Then brought them back the the house. We walked them, then went right into the house. Wes lived with Peyt and I for a few months. Wes is not new to Peyton. Jax on the other hand had never been in my house with Westin and Peyton. Westin is really a good guy, confident and friendly. It was interesting to watch Jax though. Jax is also an easy going guy but he watched Westins every move all day. When Westin and Peyton were interacting, Jax would go over and check in on Peyton, as if to make sure she was ok. The only time Jax growled at all was when Westin became a little too excited around me. Jax may have been telling him, don't hurt my Dad, I'm watching. Of course Westin would never hurt me, he was just excited to get attention and Jax sensed that later. We all stayed for most of the day/night together, Jax showed signs of wanting to play with Westin. Westin wasn't really interested in play, but then Westin didn't want to play with Peyton at first. Wes and Peyton do play now but didn't yesterday. Jax would approach Westin and lick him in the side of the mouth and gently play bite on Westins cheek. Jax is just such a sweet boy and gives almost everybody a chance to be nice. Jax kept an eye on Westin all day and shadowed him wherever he went. I think Jax was just trying to figure out who this Westin guy is, and if he could be trusted. Westin felt 100% at home at my house, he was at Grandads after all. It looks like the "3 some" is going to be just fine although it's almost 200 lbs of doggies. We are planning a car trip soon with the 3 of them to the mountains for run and play time off leash. It's important that they feel comfortable as all of them will be in the backseat of my car. One thing that struck me was how soon Jax wanted to play with Westin. It took weeks for Jax to play with Peyton. It could be that Jax is settling on more and getting more comfortable in his new home. That is good news. The cool thing about all this, is that Jax seemed to take it upon himself to be watchful over his family but at the same time be friendly to strange dogs and give Westin a chance to earn a place in our home. Everyone left it on very good terms, and I would say the first "meet and extended stay with Jax and Wes" went very well. Good news!