The default widget has all the pet images aligned to the left and the links centralized which is... kinda dumb. After trawling the webs and trying it out on my own profile I figured out how to make them line up, so even if you don't have a fancy profile or pet buttons or anything, you can at least make your Pets section look decent.

div.avatar_head{margin: 0 auto}

Add this to your profile CSS and voila!

Thank you! This is super useful ❤️