Catch dog help needed.

I use the "get out" with all my dogs.Even my lab knows that it means to stop . 2 out of the three bay dogs wont even attempt to look at a cow. The other one which is older now just runs in the middle of the cows on her way to the pond. Also , I would never use the shock collar to correct fighting other dogs. Should I also trash him off of deer?? The help dog I have was bad about deer until she met some goats. After a few pops from the collar she now knows not to mess with deer. I heard mixed results using goats but it worked really well for me thus far. The last time we hunted we saw alot of deer and she didnt think about going after them. Thanks for the advice!!