I have a pet nominated for the spotlight and I was wondering if I change (like add or reorder) the treasure chest or the pet friends, will it affect the nomination (e.g. will the pet get kicked)?

I've added items to and rearranged my nominated pets' TCs, and never seen them get kicked for it. Not sure about pet friends, but I wouldn't think that'd make a difference either.

As long as you're not altering the CSS to make changes to TC and pet friends, you should be fine. :)

Great :D Thank you so very much for your quick answer^^