7 month poops three times a day

Our 7 month goes to daycare. He has been pooping once a day since he was 5 month old and has a nice routine. Just recently, he starts pooping three times a day. We think it is too many times for his age. He normally takes 21oz formula, 2 Gerber jar of baby food, one small bowl of rice cereal and half egg yolk. After introducing solid food, he doesn't like his formula any more and it is getting very difficult to feed him. BUt the teacher at daycare is able to feed him 7oz one time and tells us he eats well--totally opposite to how he eats at home on weekend.

Do you think he is eating too much? Or are we just paranoid? Thanks.