There is no statement in the scriptures indicating that the flesh of animals and birds and other living creatures was used as food before the days of Noah. It was after the landing of the ark that the Lord gave his commandment concerning the eating of flesh.
Joseph Fielding Smith, Answers to Gospel Questions, 4:42.
Instead of our first parents eating animal food, they subsisted upon herbs and fruits of the earth, which were originally designed for the food of man.
Orson Pratt, in Times and Seasons, 6 [1 June 1845]: 918.
I am still eating chicken for dinner tonight. I just thought these were interesting and didn't remember hearing anything of the sort beforehand.