The front of our fence is pipe and cable wire with slick wire in between. I have put up some garden fence on half of it where they were getting out but they have foudn a new spot. Some of our fence is no climb horse wire. THey can't get out of that. The rest and majority is regular 4x4 square wire fence. The guy who owned the place before us cut holes in it I guess so his goats could get their heads through it, but my dogs (big dogs too) can wriggle themselves though. I patch as I can but they always find a new way out.
We have about 2 acres. I don't know if we should get an invisible system like these PetSafe Stubborn Dog Fence Kit - HIG11-11052 at The Home Depot
PetSafe In-Ground Radio Fence Pet Containment System - RF-3004W-11 at The Home Depot
PetSafe Wireless Pet Containment System - Covers Up To 1/2 Acre Radius - IF-300 at The Home Depot
Or if we should go with just an electric fence. http://www.lowes.com/pd_92220-305-SS...Ntk=i_products
An advantage to the invisible is that it can't shock my kids :) Down side is that it is pricey. Any other alternatives I am not thinking about?