if i were you i'd try to get them exhanged for something else instead of replaced. they are really pretty when you can see them....but they hide A LOT...which also makes it really difficult to feed them. in fact, i still can't figure it out. i've tried putting food right in front of them but i don't think they eat it. they are really beautiful, however i consider them to be one of my mistakes. i didn't get into this hobby to kill the livestock, but i am afraid these will eventually die from everything i've read.