Collars and horns?

[saltphoenix]

I keep collars on all my goats too but I have definitely seen them hook each other with their horns on other goat's collars. Not often, but it happens. Usually an older doe with a teenage whippersnapper wether. They rough them up and push them back but then UN-hook them with just as much ease as they hooked them with. I think they know exactly how to "snatch 'em up by the collar" without damage and I hope for the best.  
I need them to have collars more than my fear of them killing each other, I guess.