Babies poops after starting solids

Amanda

My son is 5 months old and we just started introducing solids a little at a time maybe a total of 2 or 3 times now. Since giving him some solids he’s had foamy looking, foul smelling poops.. is that normal? He’s exclusively breastfed too and I’ve read it could be from a foremilk/hindmilk imbalance but I’ve noticed it more so since introducing new foods.