I currently have a side-quest to mail off a perfect rabbit carcass and a perfect squirrel carcass. When I approach the post office with a rabbit carcass the option to mail it remains greyed out.
I'm mid-way through chapter 3.
Searching google brings up conflicting posts on sites like Reddit. Some claim mailing is a feature later unlocked in chap.3, and some claim they've mailed the carcasses in chap.2. Some claim they need to be unskinned, and some say they've skinned them.
Does anyone have some confirmed information?
Best Answer
Sounds like you are doing the Wildlife Art Exhibition mission.
If I had to guess, you probably only have one of the carcasses (your post makes it sound like you just have the rabbit). When you have both in your inventory, the option to mail them should become available at the post office (the Wildlife Art Exhibition mission will notify you as well). I also recall skinning the rabbit and being able to send it no problem (I don't think squirrels are skinned).
Some more info here so you don't have to rely on just my anecdotal advice.