I have a 4 week old chick that has watery poop. Also stinky as can be. I am feeding non medicated Nutrena Nature Wise chick starter. I can't find my bottle of Corid so now i have to go get that and/or medicated feed. My question is should i stay with to same feed and just start Corid or do i get medicated feed and start that. The chick seems to be eating and drinking ok. Can i do Corid and switch to medicated feed at the same time? or is that a no no? Advise needed!!