I also heard that and am relieved to read your responses. My 2 silver and 2 gold sebrights arrived yesterday at the post office along with four mystery standard yellow chicks. They seem fine, a little sleepy at first. I put vitamins in their water and they perked up. They just look so tiny with the regular chicks! There are 13 chicks in two brooders in our laundry room and I promised my family these are the last for a while.
We have 12 four and five week olds in the coop now, austrolorps, RIRs , americaunas, sex, link, barred rock, and two silkies. We put the bigger ones in the garden for a couple of hours and they loved picking at the bugs and eventually settled for a nap under the zucchini leaves.
I haven't had chickens in years and forgot how much fun they are and the relaxation that comes from watching them.
This site is a wealth of info, so glad to find you all!
Karen