underground dog fences?
 

who makes the best ones?

the radio controled one by petsafe works good with my dogs you can put mutible collars on different dogs and its wireless no digging (this is what sold me). i got it at pet smart

Yep,
This is the best one. No underground fence to mess with. It keeps my lab
at bay. Most bigger dogs will learn to just run through the fence.

roflmao...neighbors weeny dog learned real fast to stay next door and not try and chase me..

they got the wireless one

I have had both, the one with the wire is more precise and can cover much larger boundaries,but its a pain in the butt to find where your wire is broken when it gets cut. The wireless one works good too without the headache of all the wires. I think both of mine were Innotek. Find the one you want out of a cabelas or bass pro catalog,then shop it on ebay. I bough both of mine off of ebay and save quite a bit. Worked on both my lab and weimy. Just keep up with the batteries.