Collar of InconspicuousnessEquipment 8
Source Pathfinder Core Rulebook
Price 475 gp
Weight 1 bulk
This leather collar's worn and almost threadbare look belies its magical nature. When your companion wears and invests the collar, it gains the ability to change its appearance from that of a ferocious animal into a more inconspicuous form.
Activate 
envision
Effect You touch your animal companion to transform it into a nonthreatening Tiny creature of the same family or a similar creature (for instance, a house cat instead of a tiger, or a puppy instead of a wolf). This has the effects of Pest Form (2nd level, or 4th level if your companion can fly). The effect lasts until you Dismiss it.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
CompanionAn item with this trait can be worn by an animal companion or similar creature. A companion can have up to two items invested.
InvestedA character can wear only 10 magical items that have the invested trait. None of the magical effects of the item apply if the character hasn't invested it, nor can it be activated, though the character still gains any normal benefits from wearing the physical item (like a hat keeping rain off their head).
PrimalThis magic comes from the primal tradition, connecting to the natural world and instinct. Anything with this trait is magical.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.