We have a Brittany about 1 yr. old and bought a shock collar from ebay for about $35.00 - We have only had to use the shock feature one time and the vibrate feature a few times at the beginning ..it took about 2 days for our Brittany to get the idea and now we can let him out and when we call him he runs back as fast as he can....it is beautiful to see him run. There is no way we could use an invisible fence since if he ever got through the fence while chasing a squirrle or some other critter he may never come back home and we would not realize what the problem was..we also paid $40.00 to have him microchipped just in case but I highly reccomend the shock collar...I am here to tell you they reallly work with very little effort..