Losing 5 dogs can’t think of much worse, sorry to hear that. What put me off running a dog with collars was a mates young dog, think it was around 10 months old overshot a rabbit as they do and got tangled in barbed wire, panicked and made a lot more mess than was necessary, collar and dog was entangled, I don’t know if it was the fault of him wearing a collar or the dog just being young and headstrong, I’ve had a few mature dogs caught in barbed wire and thankfully they’ve had the common sense to stay still till we’ve been able to reach them, but as you say it’s each to their own, atb