as long as they aren't hard there is nothing wrong if he's eating solids.
And babies can go up to 12 days without pooping. Jaidan used to go once a day and then he started going up to 10 days! I went to the pead and he said it's normal for up to 12 days... the stuff he had held in for 10 days... well I'm sure you can imagine the size and stink
lol