My lb had these when teething x
It can also be a sign of intolerances or allergies so just keep an eye out. This was the most obvious symptom for my daughters CMPA diagnosis x
A little mucous on occasion can be normal in breastfed babies. But also can be a sign of an irritated gut if lots of it/more regular- can be caused by allergies or a virus, and also therefore very common after the rotavirus jabs! My little one had an entirely mucous nappy after his first jabs
My baby also have those poos asked my GP and she said its normal. I asked my mum she said he might be teething