Runny waste

[Bruce]

I've started feeding my baby cut up nigtcrawlers a few days ago, and he's been eating A LOT of them. Now, for the past 2 days his poo is a bit runny. I figured it was due to a diet change, from hard bodied animals to soft, but I figured I should post here and find out for sure.
Do you guys think he could have snagged a parasite from one of the nightcrawlers?