+1 on what Eggcessive has posted above: Please don't tilt the bird down and rub its crop upward; you're as likely to aspirate the bird and kill it as you are to help it. Follow Eggcessive's advice above too. Here's a good source for understanding what you're dealing with on Crop issues:
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/
I'd add that you can also use Olive Oil, Vegetable Oil, or Mineral Oil, but those have to be given via syringe/dropper in most cases. By being able to freeze the Coconut Oil, you can feed it to the bird with other food/snacks to make sure they ingest it. More on giving fluids to a chicken can be found here. Pay close attention to the last photo before the comments section to see where you want your syringe/dropper to be and what to avoid:
https://bitchinchickens.com/2020/02/06/how-to-safely-give-oral-medications/
For clarification, has the bird been in this condition for two (2) days? Or, has this been going on longer, and the comb started to fall over two days ago? Since you mentioned mites, you might have multiple issues going on at once, and one can make the other worse and vice-versa.
As for the mites, it's imperative that you get a handle on them quickly too. Diatomaceous Earth (DE) will help prevent them, but Permethrin is what the experts here recommend for eliminating an infestation in the coop and on the bird(s). If he has mites, it's likely his friend (hen) is affected as well.
