Every TouchBound product supports an optional background animation.
It is found in the object's inventory under the name “BACKGROUND_LOOP”. And is mainly used for collars that are too tall to allow the avatar neck to move.
Note: A lot of the low collars use a “partial” neck animation so the head can still turn but the base of the neck is frozen.
To turn off this function, simply rename or remove the animation called “BACKGROUND_LOOP” from the object's inventory.