HH,
Cesar did have one episode where he used a shock collar in training a dog. It was on a ranch in Texas and the dog would chase the truck or tractor and was in danger of getting run over. After about an hour of training the dog no longer chased the vehicles.
His method didn't appear to be inhumane.

I have trained several dogs and have not had to use a shock collar, but in this case (snakes) I wouldn't hesitate to use it. In the regions of west Texas where my family lives, dealing with rattlesnakes is a daily occurance and sometimes life or death (50 miles from town).

I agree with what the other posters have said.

Consider all options if you truly love your dog.

Tango