Sunny isn't lame, but she seems to contemplate moving for a moment before she actually does it - so yeah, I'd say she's sore. I gave her some Banamine, I have kept it on hand for the minis for years (not a good idea to give Bute to a mini). I really need to get some Bute as well, it's not as expensive, and I understand there are some things that it works better for, anyway.
It's funny that you asked about Critter being sore. Critter is my DH. He'd been putting in a brick patio for someone for the last couple of days, so yeah, he's pretty sore, too. Don't think it would be a good idea to give him Banamine, though; he'll have to make do with Ibuprofen.