Only new to me. I just bought 4 chicks today

[winonajane]

Two chicks are 2 weeks old and 2 are just a couple of days. One of the older chicks has runny butt. Is it catching? Should I remove her?

 

[TerriLaChicks]

Are you giving them medicated feed? are they in a warm brooder? do a search (up at the top of the page) in the "Raising Chicks" thread for runny butts & you will get some info that will help you figure out what's going on w/your chick. not quite enough info in your post here to tell...