Tink gets out of all the head collars, or she'll just refuse to walk with them on (which is the last thing I ever expected from her). Finni slipped her harness in about 2 seconds one time.

I about had a heart attack.
Now they're all in Buddie Belts, and I am going back to walking them separately to train and teach them some manners. Occasionally I'll walk two at once, just for socializing and practice. I think they really like having me all to themselves though.