Last evening I noticed some loose stools and the chicken hadn't eaten her food from breakfast. Crop ok, acting like herself, but not eating. I decided to worm her with Safers this am. Went out and she had eaten all her food and layed an egg. I know I need to dump her eggs now, but no issue since I'm vegetarian and my husband refuses to eat her eggs anyway. We give them to a friend. But how often should you worm chickens? Every six months? It is hot here now, almost 90, so I expect she's drinking more. Could have been why stools were loose, but would rather be proactive. I've been giving her chilled acv water, which she loves.