She did a swipe of her mouth and crop, nothing abnormal. She hasn’t pooped so she couldn’t check for tapeworms. She wanted $150 for X-rays and then more diagnostics, I really didn’t like the vibe I was getting at all. I have a friend that lives nearby that’s had chickens for years, She said it looks like Possibly Gape worm and I’ve never worked them so giving it a shot.
Did she give you the Flubenvet?She also said there’s gas in her crop. She recommended flubenvet 2.5 for worms
@casportpony is the worming guru - she can correct me or give you better instructions than I can, but if you don't have the worming medication yet, you may want to use Safeguard at .23ml per pound for 5 days in a row or Valbazen at 1/2ml for 3 days in a row if you think she has Gapeworm. It's fairly rare in chickens and I would expect her to be coughing and showing more signs of respiratory distress. Both of these wormers will take care of most worms if given correctly. It's a shame she didn't poop so you could get a fecal float. If she has tapes, then Praziquantel might be better.
IF the crop is gassy, then this could definitely be the cause of her yawning/opening the mouth. I would make sure she has water, but would probably withhold feed for the rest of the day on work on the crop. Give her a good crop massage 3-4times a day, see if you can feel anything in there, even something as small as a marble can sometimes be a problem. I would start out by giving 1 teaspoon of coconut oil (I refrigerate it and they will eat little chunks), give her a massage, she may actually burp some. I had one hen that was airy in the crop, but she had an underlying condition, but I worked on her for about a week and got it cleared. She lived a few more months until she succumbed to internal laying. Anyway...here's a very good article on crops you may want to read
http://www.backyardchickens.com/a/impacted-slow-and-sour-crops-prevention-and-treatments