is it normal for a breastfed baby to eat less at day care my son is 2 months and will only drink 5…

is it normal for a breastfed baby to eat less at day care my son is 2 months and will only drink 5 oz on the second day he drank really close to nothing,also the first day he had to be on formula I forgot my breast milk at home and ever sense then he hasn't pooped!? he's not in comfy or in pain tried juice it didn't make him so but when I change him there will be a little smear of poo? sorry if tmi