How do you customize your deer in the endless forest?

It seems you're asking about customizing a deer in a game called "Endless Forest." However, there is no such game known as "Endless Forest."

There are a few possibilities:

* You're thinking of a different game: Perhaps you're thinking of a different game with deer customization. Can you tell me more about the game, or what platform you're playing on?

* You're talking about a mod: There might be a mod for a game like "The Forest" that lets you customize deer. If so, you'd need to find information about that specific mod.

Please provide more context so I can help you find the information you're looking for.