[Rodsrsr]

The breed has a lot to do with this as well. GS and labs are good working dogs and are usually not roamers, "unless they are intact" If so all bets are off and they will roam. Not sure about the Ridgeback but same rules apply. I've had GS dogs my entire life and lived in both city and large acreage rural properties, and while each dog is different with its own personality, they tend not to roam. They would rather stay close to home protecting. Having said that its sounds like they have been roaming for the past 5 years so its now a habit. A physical barrier is best even if its just an area around the house 1/2 acre or so, which has the added benefit of keeping things out. The wireless units are effective but require some training as well. Its not plug and play. Lastly, if your dogs are still intact at this age don't waste your time now getting them neutered, it wont change anything.