Now I can't sleep thinking about you and Gus,but I do have a suggestion.
Continue doing all the things that have been suggested,and also, now I don't know if this will sound dumb to you or not but I would do it in a heartbeat if one of mine went missing.especi ally if I thought someone had them.
I don't know where you are located,but see if there is a *search and rescue* group (dog search and rescue group,or tracking group). Even if the police have dogs in your area.
I don' think this would qualify as an actualy emergency for either of them but practice is practice.And if you could get any of them to come out on their own time and help you search I think that most would be willing.
We have very active groups here believe it or not and I'm sure that they would be willing.Even the police dogs/and handler.
It's just an idea that I can't seem to get out of my head,and it would be something I would try.
In our Thoughts
Tricia and the fur kids