Ok so as some of you know I recently rescued a tiny pitbull to be a companion to Fergus, her name is Maddie. My mother had also rescued one to be a companion to her pugador, Nikki, her name is Mia. Mia and Maddie were both brought into a local day care that works with the rescue group at the same time. They were crated near each other and would touch paws between crates. Then they went off to be spayed together. Since then Mia has shown dominant aggression towards Maddie. When we picked both dogs up for the first time Maddie would approach Mia and Mia would tense up and in some cases ark and growl at Maddie, not in a playful way. The day care owners are very pitbull friendly and gave of some tips on how to introduce them and keep things in good working order. Well their next meeting would be this past Christmas. We entered my parents house and Mia immediately focused on Maddie. We attempted an introduction and Mia's tail wagged but she was tense and then proceeded to follow Maddie just behind her neck, which we put a stop to. Mia was laid on her side a couple of time as we coaxed Maddie to approach her, sniff lick and stand over top of her, Maddie didn't want anything to do with her. So we tried to walk them together, everything went great, they walked right next to each other no issues at all. When we got back inside it was more tension from Mia so we removed her for a while so that Maddie and Nikki could become better acquainted. It was then decided that Mia would come up, lay on the couch with my step father and she would be leashed. Maddie was playing with Nikki and got close to the couch and Mia lunged out and bit Maddie on the top of her head. All of of us jumped up, and I had to hit Mia multiple times to get her to let go which she did. Luckily she didn't get Maddie too badly and Maddie doesn't seem to be affected by the situation. Now as this was going down there was lots of snarling and growling like I had never heard, Fergus and Maddie growl when they play but it was a totally different sound. So my mother has been all broken up about this and has talked with the daycare people about what to do, considering just fostering the dog or keeping her.
The daycare people have been willing to work with the dogs to figure out what the issue is and fix it as they have done with others in the past. I am not read to put my dog back in that situation again. They also told my mother that lots of noise is a sign that Mia was trying to scare her and not kill her as that is generally a more silent act.
Just looking for any advice and knowledge with this as I am new to it. Both dogs are fine and Maddie is healing up nicely, I don't even thing she knows she has marks from it.