It's been quite an eventful day, a little stressful though, particularly as I'm such a worrier by nature. I brought Nemo down to get Zoni and I would say the intro went pretty decent. Nemo was a little overwhelmed by all the puppies but when Zoni was just with him it was better, he was a tad growly which I would think to be expected. They played several times pretty roughly and it seemed like he was fine with her. After the 4 h car ride home (amazingly she didn't scream that much at all, just about 30 min total) they played for a bit and I put Nemo down in his kennel so he could rest a little and I could have a little time with Zoni.
When I let him up, he was not really happy with the puppy there at all and really growling and snappy. I would have liked for them to meet each other more outside in a neutral area but the snow is really deep and it is way too cold for them to be outside for an extended period of time. So I put her in the x-pen and he continued to growl and snap at her through it as she was trying to greet him through the pen. The snapping seems a little more extreme to me than just "teaching" the puppy but I'd rather err on the side of caution. So I'm sure he is just really stressed out from the day or stressed in general because she is on his turf now. He doesn't seem to be reading all the submission signals at the moment. I counter-conditioned him a little with the clicker when he looked at her and got him to sit by the x-pen and look at her without growling and he started to sniff her again. I let her out and they played some more for about ten minutes. Nemo wanted to take a nap, and was a little short with her (he's like that with every dog in that situation) so they're separated now so everyone can relax a bit (including me).
So, the day didn't go as well as I would have liked, but I'm sure tomorrow will be a better day. If he is snappy tomorrow I guess I'll try to introduce her to him when she is in the pen first, condition him some and take her out when he seems like he is pretty calm.
Sigh.