Hello, can you tell me what it might be? We're on gavage, they say tha…

Hello, can you tell me what it might be? We're on gavage, they say that breastfed babies up to 7 days may not walk for a while, we haven't been walking for 4 days. Today we had a full diaper, everything was normal, the second time today he pooped, there were pink specks, but not much, could this be? Could it be a microcrack? Or is it something more serious? Anyway, we'll go see a doctor. I'm just worried.