Dear Daf: It seems according to Rabbi Shimon--if someone puts a chicken on an egg erev shabbos...the egg does not become muktzah...whereas grogros and tzimukim does. Why? aren't they both --maktzeh b'yodayim?
Thank you.
Setting aside a chicken from use on Shabbos is done in such a way that the egg is not made unfit for consumption (that is, it can still be eaten; the chicken above it must simply be removed). This is not so, however, with the dried figs (Grogeros) which, by put on the roof and becoming partially dry are made unfit for consumption (until they completely dry). This is Rashi's intention on 45b, DH Ela b'Grogeros.
Be well, Mordecai