Collars….such a touchy subject. A day doesn't go by where I don't worry about our two b's. We have had our boy tattood with his AKC number and I plan on doing the same to our girl.
We keep martengales on ours but anytime I try to add tags they will try to chew them off and end up getting their teeth stuck in the tag which is not a good thing. Its hard since you want your dog to be ID'd ASAP if they run out the front door.
I wish there was a Basenji tracking device that you could keep on your dog at all times that way if they accidently get out, you could find them on your own.
Are they chipped?