She has been great all morning and then she pooped in her water which, ofcourse, made her not drink. She started the sneezing again and breathing heavy. I cleaned out the water, she drank, and now she is fine again. But it seems like she gets tired after having the breathing episodes. I have no clue what is causing this. I see nothing in her throat (though it is hard to really see well) and no discharge of any kind. Her poop looks just fine too. She does free range often, do chickens like to eat slugs and earthworms if they free range? it's a bit hard to stop them when they are out on their own. I don't want to treat for gape worms and respiratory at the same time as that would probably be a lot for her all at once. This chicken does sneeze quite a bit anyways, she always has compared to the other chickens so I wonder if she just has something wrong with her. No other chicken is having any symptoms.