Liesje
Posted : 8/24/2008 9:41:34 PM
No they should not come apart that easily or that soon. My uncle's came apart on me, but that's because he always pinched the exact same link to get it on/off and had been using it for a long time.
Yes, fit is important. If the dog shakes, the collar should really stay in place. Unlike other collars, you don't need to be able to slip fingers or a hand under it, as long as it's not pushing into the neck.
This is a good fit. The collar is tight but not actively pinching and there is no slack in the martingale chain.

Also, I personally recommend getting small or medium sizes and adding links.