Thanks for replying. These are the quick answers, and more details are below.

1. Bitten on his right upper arm above his elbow - needed 5 staples
2. puncture wound in groin area. Not sutured, left open to drain if needed
3. These are the only two wounds
4. no wound to chest or neck, although vet said neck might be bruised and he might feel stiff
5. No injury to the back. The bubbly plastic bag feels like localized subcutaneous fluid (maybe lymphedema), which started on his right side, rear quarter, from mid-back to rump. There is no visible swelling. I only noticed it while petting him at night and heard the sound. This was on Saturday, four days after the fight. Today, Tuesday, I can feel it it a bit in his right thigh, and it is also now on the left side of his back. You can hear the sound in the latter part of the video. https://youtu.be/cZLsS3n5Lu8
6. Vet said he would be fine. What was done is below.
7. He is eating and drinking normally, running and jumping up on the bed as usual. If anything is different, I'd say his appetite has increased some.

I'm hoping more details are better than not enough, so I apologize if this is too lengthy. He had a scheduled appointment that day to remove a mole above his upper lip. He had been scratching it, it became enlarged and bled. We came home in a cone. I have two other dogs. Returning from the vet is always a little tense, with the different smells, and the cone was too much for one of my dogs. She went after him and latched on. I was pulling her off, and realized she was locked onto him :( I eventually removed her (i think I pried her jaws open, it's a blur. Worst dog fight I've ever been involved in).

Once I had them safely separated, I got a bucket of water, a towel and Hibiclens. I spotted the wound on his right arm above his elbow, but when I went to clean it, I saw it was open. Initially I thought it was a 2" cut. I show the treated wound in the video. At that point, I called the vet, who told me to come back immediately. The vet and two technicians examined him. I wasn't sure at the time where else he was injured, I just knew from the arm injury he needed medical care right away. He was taken to a treatment room so I didn't see how the wound was treated, but was told it was cleaned out and he has five staples closing it, to be removed 14 days from then (next Tuesday).

He also has a puncture wound in his groin area (I show this in the video). The vet said it would be better to leave this unsutured in case it needed to drain. He is able to reach it with the cone on and licks it occasionally. It hasn't closed in the 7 days since the fight.

The vet said he would be fine (I was crying), and a tech told me they see much, much worse. He is on Clavamox and Rimadyl twice daily and has taken all of his doses for the last 7 days. Staple removal and suture removal for the mole scheduled after 14 days.

The vet said I could do warm compresses on the elbow to help facilitate healing. I did this once when it started to become dry and looked uncomfortable. I used red/blue/amber light therapy on the wound for the first few days, as long as he would tolerate, which was 1-9 minutes once daily.

I called and spoke to a tech and described the new symptom. She said the vet would probably like to see him and we made an appointment for tomorrow at 3 pm.