No
pruning shears
If it is a slip away collar, the cat might of had it caught on a branch or something similar and yanked hard enough so the collar brakes free. If the collar has a latch that is not slip away the cat could have slipped out of the collar if it was not tight enough. (Both incidents have happened to me)
Another word for a fastener is a snap. A collar fastener is a fastener or snap that is used on a collar.
Collar bone.
Collar Bone
clavicle
When you re pulling on his collar . you are obviously hurting him,, check and make sure his collar is adjusted properly, and do not pull, this is no way to teach a puppy, you teach him by gently leading him on a short leash, when you walk, he walks , when you stop, he stops, this takes patience and gentleness, and always speak in soft tones.
Upper Vertebrae
Collar Bone is another name for clavicle. Those two are synonyms.
Another name for the collarbone is the Clavicle.
The collar bones are paired bones (two, one on each side) and are also known as the clavicles.
The clavicle is often referred to as the collar bone.