Uh oh. I have been noticing for a couple of days now that some of the chick's poo (they are between 1 week and 2 weeks old) have had some runnier poo. I have checked them for pasty but and have come up negative. Is this common? Should I be worried? We have been feeding them Purina Start & Grow medicated and have had them for almost a week now. We thought it might be the heat so we raised the lamp, which seemed to make them happier, but the runny poo is still there. Any suggestions? We did just start them on some grit last night and gave them a few meal worms as a treat. Help!?