@imbj - Thanks for posting this... any treatments for this in dogs is great and great that there is ongoing research ongoing for all cancer in dogs and humans too!
I have one called "Fi". Works with your phone. Seems to work great but I don't use it that often. When I think there might be an issue I'll swap the regular collar out for it. If the dog was off lead I'd always have it on.
It has an alert and light on the collar so it can act as something of a beacon. It also counts how many steps your dog has taken and how far it has gone (no guarantees about accuracy).
She didn't really say which dog, and now she has avoided my question! I will send another e-mail to her.
Please, do it, if it's possible.
Because I feel strange of this…
I can say, anyway, that all my dogs are now here, with me and they don't lack anything.