I used snaps, but Rosie's collar fell off one day (the plastic snap broke) fortunatly she just sat under the tree all afternoon. I discovered Star's snap was broken and replace it with a metal snap - they sell them at most big pet stores. However, I just ordered some adjustable collars that loop over their heads from a husky supply place - will let you know how they work out. they were very inexpensive, and it's the kind i've seen breeders use.