Hi, I am thinking about getting an electric fencing for my dogs. I have two brittany spaniels I would need it to hold. My dog is going to have puppies so I plan on using the money from the pups to buy it so it wouldn't be until july or august. I looked them up just to find out the cost, and got really confused. It would need to cover about 437 feet around the house. I just need to know how they work and what you guys think about them or about how much and where you got yours from (if you have one). Any info?