Collar

The Collar.

The Collar is an armour type for wolves and cats. The crafting recipe can be up to you however, I imagine it being crafted like a furnace but with leather, gold, diamond or netherite. Obviously the netherite is made by upgrading the diamond collar with the smithing table. Also, the leather ones can be dyed like leather armour. The collars have durability and armour points but can't be worn by players. 

They can be enchanted as armour or as weapons, the decision is up to you, but if it works as armour, it gives armour points as mentioned. If it is an armour piece, I imagine it will have the same enchantments as regular armour, but, if it's used as a weapon, I have some ideas for new enchantments.

Mauling Enchantment - It only works for wolves because cats don't attack mobs. This enchantment deals more damage to attacks by wolves to mobs with skin like zombies, drowned and husks, it will not work with skeletons or slimes etc. It has as many levels as you like.

Gifting Enchantment - This is used for when cats bring back presents during the night. This enchantment is one level only for this reason. Like bartering, the chance of getting certain drops is randomised. The list of drops I imagine could be (going from common to rare) sticks, feather, paper, string, ferns, rabbit hyde, leather, seeds, wheat, wool,  gunpowder, flint, arrows, spider eyes, ender pearls. Things could be added or removed. Its up to you.