Wow! It sounds like you all had a big scare! Do you have a neighbor who is home during the day who may be able to check on the dogs for you? When my brother's dog was younger she learned to go through screens on windows and doors to get out and luckily the next-door neighbor works at home and was able to keep her at her house with her dog until he got home. It is a good thing your dogs had their collars on, I assume they would have an ID tag with your name and number on it in case they get out again and someone finds them.