Hindi ko masyadong alam kung normal na talaga yan for mixed fed babies kasi bawat baby talaga is different, one of my friends' son nag-poop din ng maraming times pero okay lang siya, but honestly with 5 times in 3 days and now ulit ngayong araw, I'd really suggest you check with your pedia para sure, lalo na kung may ibang signs like fever or ang consistency ng poop ay off (like too loose or may mucus). Best to get peace of mind na lang, mama!