Deer have four distinct head shapes.
- For a full list, see Category:Deer.
Notable deer include Holly Daze, who is currently the only deer NPC ever added to the game.
- The deer is the only species that disallows the change in head size but allows the change in size for its antlers and muzzle.
- Attendees from ReplayFX 2017 had the opportunity to play as a deer, along with the crocodile. Both species were implemented on September 1, 2017 for Toontown Rewritten's v2.0.0 update.
- According to a poll on the Toontown Rewritten website, 56% of players like the deer's design but think sounds should be improved.
- Based on this feedback, the deer's sounds were adjusted and made quieter to fit the sounds of other species.
- The Laff-o-lympics was an event that offered prizes to any deer or crocodile who managed to reach 50, 100, or 115 laff.
- During the Twelve Days of Winter, deer were able to receive a permanent or temporary red nose from Holly Daze as a reward for completing her ToonTask.