I just noticed that my 2-week old chicks were able to peck and eat the foam packing I had put the corners to round them. I have removed it, but there is about 3-4 teaspoons worth of foam (not styrofoam, but like a fine sponge) missing among 24 chicks. They have had some grit with dandilions, but I am worried about this substance. I don't suppose there is anything I can do if I start seeing sickly birds?? Right now they all look fine, and they just started succeeding in eating it in the last 2 days.