My son will be 4 months old next Friday. He is exclusively breastfed. In the past week he started only pooping once or twice a day. Wednesday he skipped alltogether. I've been notcing his poop has been thicker than normal, a very pasty consistency. It has also been browner. Is this normal? His diapers have also been wetter with pee lately. He peed through a diaper during his nap this afternoon.