Rechargeable Waterproof Dog Training Collar with M86 Collars

Installation: It takes a little time to get it in the ground, but it is worth it. To put it into perspective, I have just under an acre and it took me and a friend under 5 hours with nothing but a narrow shovel and a large paint stirring stick to push it in the ground. Spring time when the ground is still wet was the perfect time.Does it work: I have a 60 lbs. German Shephard/Blue Heeler mix puppy that is extremely active and very hard headed. It took a few weeks to train him properly and still had to use the highest setting for a while, but he stays in the yard now. I watched him chase a cat and go from a full sprint to a sliding stop when he got close to the boundary line. The only problem I run into is now that he is trained, it is difficult to get him out of the yard. I have to pick him up and carry him over the boundary line while he is squirming because he is afraid of getting shocked.It is great to be able to give him the freedom of roaming his full yard without having to worry about him chasing the neighborhood kids down the street or wondering off.