I'm not sure if any of you have had experience of such a situation but I read this article this morning and found it quite alarming as my lot are always playing rough and tumble and pretending to grab each other round the throat.
I'm attaching the full article below but the upshot is that should a dogs teeth get snagged in a collar, the twisting and writhing can break their jaw and the dog whose collar is snagged can be strangled. If you're on hand and the collar is a quick release type, injury can possibly be averted but if it's a buckle, unless you have a knife etc handy, there's little you can do .
I've never left leads on in the house (which I got lambasted for once but there you go) but I do leave the pooches' collars on. Has anyone had experience of this?