Today when I was changing my 2 Rhode Island Red/New Hampshire Red's water and feed, I noticed there was a lot of watery, unusual poop in the coop. When I took them out, they pooped on my brother and I's shoes, and it was the same consistency. They have otherwise been acting normal, and this is the first I've noticed their poop like this. They are about 5-6 weeks old and I have been feeding them Manna Pro Medicated Chick Starter from the beginning. I'm just wondering if this is normal or not.