Hello, can you tell me what it might be?

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.