Some are considered bad now.
The ways I heard:
1. stake the dog out in the yard on a 1' rope until it learns you're the boss.
2. crate the dog until it learns...
3. get on all fours and make the dog cower under you.
I like #2 and #3.
#3 is highly effective, especially if you growl a little when you do it.
My male dog gets a little testy at times. Trying to assert dominance onto me and when he does...
#3. grrrrrrrrrrrrrrrrrr
I also say. "Better watch out fucker or I'll make you my bitch" (he hates that)

The reaction I get from the other dog is priceless. She's like, "I'll be good".
