This is a UV bug. Adult collar model can go where ever on the cat you want (as expected), baby collar models can only go on seemingly inconsistent areas. Not a bug for vanilla, sure, but still a texture bug.
Hi there Manos, I’ve attached a small resource pack. It includes the Baby Cat Collar with a solid white texture and it also includes an Adult Cat Collar texture with a solid white texture for reference.
This is a UV bug. Adult collar model can go where ever on the cat you want (as expected), baby collar models can only go on seemingly inconsistent areas. Not a bug for vanilla, sure, but still a texture bug.