Reply To: K'zayis Home › Forums › Yom Tov › Pesach › K'zayis › Reply To: K'zayis March 22, 2013 8:43 pm at 8:43 pm #1146873 Sam2Participant DY: SHU”T Chassam Sofer YD 1:127 (maybe OC, not 100% positive) implies that it can and does change, though that change would be close to negligible.