<human>: Can you condense the text into three sentences or less?

My dog (ACD mix, named Bascom) had finished off his final class  tonight, pretty proud of how far he's come from when I adopted him.  At the advice of the trainer, she said I could stick around and let him play with the dogs in her next class, everything was fine until the incident.  Our trainer fosters a lot of dogs, this one was a pitbull that's probably 12+ years old and very skinny, but making a rebound on health. Flash forward to the incident; there were 5 dogs all playing together, a mixture of medium and small dog and the old pit, the were doing fine until the Pomeranian decide to run under the pit bulls legs.  That's when she dropped on him and latched on to his neck/leg, I couldn't really tell.  For about 2-3 minutes all I heard was a mixture of Pomeranian screeches and girls screaming.  Everybody grabbed their dogs, and at this point from what I was told, my dog decided it was a good time to sample treats inside the store. I happened to get behind the put with my arm around its neck, and my other hand pulling its face and attempting to get its jaws apart.  At the same time, our trainer jumped in and tried stopping the attack by throwing water on its face.  Eventually the two were separated, but the Pomeranian had blood all over its face, and the trainer and the Pomeranians owner went off to the vet.  In the meantime, I'm stuck holding on to the pitbull wondering where my dog went, while everyone else was just staring at me.  About 30 seconds later, we found my dog, with a shit eating grin on his face a deer antler, half a bully stick, and a cow snout in front of him.  I got word that the Pomeranian only had bruising, turns out the only blood that was shed was from me and the fate of the pitbull is unknown. Needless to say, this was an experience I will never forget.
<bot>: pit bit Pom, I separated the two, my dog found an opportunity to find treats, Pom is ok and my hand hurts.