My newest layer went from completely normal to coughing, wheezing like she couldn't catch her breath. No discharge from eyes or nose, acting normal. Signs get worse if she gets worked up. I checked throat and I can't see anything blocking the passageway. I've attempted to give her oil/water mixture to dislodge whatever is in there but no luck. She eats and drinks like normal. Suggestions? I think she has something stuck in there.