If done right snake avoidance flat out works. As a gundog trainer this is something I do with as many types of venomous snakes I can find. The key is using live snakes not dead ones. It also helps if they're not riled up.
I use low varying levels of stim depending on each dog and how close they push it. I place markers 5ft, 8ft, 10ft, 12ft, 15ft and use an ecollar technologies 1200 around the dogs waist. 15ft low working level taps, 12 low working level continuous, 10 step up 5 continuous, 8 step up 5 continuous, 5 step up to a solid audible response. We do this in different locations with the dog running around airing in the location. Snakes are in cages of course. After this is done we do it all over on lead with handlers. We do this so the dog acts as a warning for handlers later and so the dog doesn't follow the handler blindly ignoring the scent. Usually last a good year the first time around needed a crash course later but definitely sticks for good after follow up snake proofing is done. I should add the step ups and stim levels are figurative and should be tailored to each individual dog. I've never snake proofed a GSD but my guess is they would never push the 5 ft boundary marker while proofing, not nearly as nose driven as spaniels, pointers, and retrievers who almost always have to take the closest look possible.
I'm a soft handed balanced trainer for the most part and rarely use direct correction with stim preferring indirect pressure when needed but this flat out works and saves lives.
Last edited by Clay Hill; 02-06-2016 at 11:47 PM.