Here's Boo at 7 weeks before Boo even knew its gender.
If you've never left a comment before. It's easy. I even switched up the comments, so you don't need any sort of account. At the bottom of this post, there is a link that says 0 Comments (or whatever that number is). All you need to do is click on that link. In the comment box that appears, leave your guess. Right below the comment box, there is a drop down where you select the profile you're using. If you don't have a Google or any of the other accounts listed, choose anonymous. (But if you're leaving the comment as anonymous, be sure to leave your name in the comment box, so we know who you are.) Then just click the "post comment" button.
Thanks, everyone! I look forward to seeing your guesses!