Is it normal for 1yo to poo only once a day? Sometimes no poo for 2-3 days.. wet diapers rather heavy, about 3 wet diapers a day. Should I be worried? Started solid at 6mo but till now still not taking a lot though.

poo once a day it's perfectly normal. Wet diapers are good! So don't worry about the wet diapers. As of the solids, Its ok if baby isn't taking alot. Maybe you can try a change of food instead of porridge? Maybe noodle soup or you can try offering finger food for them to self feed to get them more interested.