6 months old having diarrhea

My 5months old (will be turning 6m next week) has been having diarrhea for the past three days. Otherwise he is doing good, his usual. He is eating normally, has even more appetite the last week or so. But no other symptoms.

He did have a cold last week and a couple of days ago we started solid but I haven’t been giving it to him for three days now.

Should I wait and how long? Or is there something 7 can give him.

He is good hydrated (he takes 5oz every 3 hours).