Talk:Snuggly the Crow/@comment-151.226.155.159-20130711163354/@comment-4511886-20130711165239

You can only trade a certain item once.

You can also only trade one kind of item at a time. So you can't for example trade a Prism Stone and a Xanthous Crown at the same time. You'll lose both items and only get one of the rewards.

You can do every trade once every NG. So defeating Gwyn allows you to trade any previously traded items again. However, trades that you didn't do before starting NG+ are lost. (You can trade, say, a Dung Pie, defeat Gwyn, trade a second Dung Pie. But you can't defeat Gwyn and then trade two Dung Pies in NG+.)