So I recently bottled a mead that I had back sweetened and oaked. It was tasting great and was stable. I think I may have oxidized it opened a bottle last night and it tasted great opened another one today and it had a harsh after taste. The only difference is that one was filled with a bottle filler and the other was filled by running down the side of the bottle like you would pour a beer to keep the foam down. the first tasted fine the latter did not. So my question is what do you all fill your bottles with? and does it sound like I oxidized my mead?