I only have 2 wonderful hens. One is a Silkie, very healthy. The other is a mix & has been sick on & off since March. She almost died but made a recovery & just has a weak immune system causing her to get sick here & there. Anyway, I've noticed both hens at various times regurgitating or spitting. There's no food, just water or liquid. Wanted to see if anyone knows why they do this & if there's any reason to be worried. Its not every day, that I know of. In fact can't remember the last time I saw them do it. Just wanted any input. Thanks in advance!!!!