She looked fine Sunday morning, then we were running crazy the rest of Sunday and Monday, so we just tossed in the feed and checked water and ran. This morning we did our usual inspection and she had this huge swollen lump. She (I think she, but not totally sure) is 13 weeks Black Spanish. She is eating and drinking fine, and is out foraging right now. I'm guessing an abcess? Do I need to put her on antibiotics? The rest of the flock looks fine and everyone is acting normal. Please help, we already lost half our flock to a predator attack, I don't want to lose any more!