My chicks are 26 days old hatched by my broody hen. Yesterday she left them and went out to forage all day(they won't seem to follow her that far away from the coop) but did spend the night with them on their nest. Today she looks like she's done brooding and has left them(she also laid an egg). I have 2 questions: are they still to young to be left at that age? Also, I spent an hour with them today and before I left the coop they jumped up on the roost to rest. They both looked like they were breathing really hard. Right above the beak I could see their skin kind of sucking in and out as they breathed(I hope this makes sense). Could they be ill and thats why mama has abandoned them so early?