She likely has a yeast infection with an underlying issue of slow or blocked digestive tract causing the yeast to colonize the crop. She probably isn't so much vomiting, as humans and dogs do, but the crop is overflowing, can't move contents down the digestive tract, so she's struggling to keep the fluid out of her airway.
VetRX won't help. That's like Vicks when we need a little relief from a stuffy nose. Your hen is way past that. She's very sick, and it will take a lot to try to fix this.
I'm going to suggest you do something we tell our fellow chicken keepers never to do because it's very risky. But this is an emergency.
Take your hen outside where you can hose off a mess. Place her on the ground between your feet and lift her up a few inches. Then tilt her whole body forward at about a 45 degree angle. This will partially empty her crop so she can breathe without aspirating liquid. This will also make her feel a little better.
Do you have any women's vaginal yeast cream on hand? If not, send someone to the store for a tube of it. It's called Miconazole Seven Day. Squeeze out an inch of the cream and get it all into her beak. This will start to fight the yeast in the crop.
She likely has an obstruction farther down the digestive tract, and we'll address that soon enough. Just do what I suggest right now.
that's not good. I'll get the yeast cream today. Do I need to bring her to the vet?? There's a poultry vet nearby but it's really expensive. Will she live??
