Tusks are a limited common pet accessory in Adopt Me! which players could obtain through digging for fossils during the Fossil Isle Excavation Event. It can now only be obtained through trading, as its respective event has ended.
Upon discovering a fossil, players could take the said fossil to the NPC Henry, who would in turn give players some information regarding the fossil that they have discovered. After taking two fossils to NPC Henry, since they uncovered all the common pets, he would award the player with Tusks.
The Tusks feature two long curved horns, that come out of a pet's mouth, much like tusks in real life.