Okay mama, yan ay normal pa rin at 1 month 19 days, lalo na formula-fed babies! Ang Similac ay maganda brand at formula-fed babies usually may mas consistent na poop compared sa breastfed. Since ang baby mo ay hindi umiiyak pag nagpopoop at active naman siya overall, that's a good sign talaga, pero if you're worried pa rin or may changes in color (like very pale or dark) or consistency, better check with your pedia just to be sure, okay?