Hirap makita ng poop color sa message lang, mama, pero generally formula-fed babies do have different poop than breastfed, usually thicker, darker, and may smell stronger, which is totally normal! At 3 months, if baby's active, gaining weight okay, and hindi uncomfortable, pwedeng okay lang talaga, pero if worried ka sa color or consistency (like super loose or may blood), better check with your pedia just to be sure. One of my mum friends had the same worry at 3 months and doctor said all good, so don't stress too much, pero peace of mind talaga ang importante.