[kanawa]

What was he supposed to do, wait until it killed his dog?

I notice the stabbed dog had a collar on it.

I've seen a 60 year old woman knock out one of a pair of fighting dogs
by merely twisting its collar, cutting off its air supply.
The dog went limp and the other dog immediately stopped attacking.

Unfortunately they don't teach this in school.

[Cronos]

woah, I didn't know that -- thanks! I heard that what you should do if a dog has grabbed on to another dog (like a pitbull grabs on to another dog and won't let go) is to grab its hind legs and lift up

I don't have any real experience doing that or seeing it, however

[dervish]

Once you stick your hand in proximity to the dogs’ head, you will likely be bitten.

The best way to separate them is by pulling the dog by the tail so you don’t get bitten. But if the dog won’t release its grip that won’t help. That’s why they sell “breaking sticks” an implement that is inserted in the dogs mouth to open the teeth.