Must the mother make up the days of Ramadan that she missed due to surgery, or should she feed a poor person for each day, and is it permissible to feed thirty poor people at once?

If your mother is unable to fast or if fasting would negatively affect her health after the surgery, she is permitted to break her fast and must make up for the missed days after her recovery. She is not required to feed the poor. However, if the illness is chronic and there is no hope of recovery, then she is obliged to feed one poor person for each day she misses. The amount of food for each day (a mudd of food) is approximately equivalent to 750 grams.