Hi Nicole,
I might have emailed you,but I don't remember doing it,so it was maybe Ros,or Sue,or Snifter or anyone else on the forum,we all try to help.
Yes,there are things you can try,firstly,if you suspect it(best way to know for sure)is to pick the bird up and feel their crop in the morning.It should be full when they got to bed,and empty in the morning where they've digested the food overnight.
If it is still full,you can give them some olive oil that you would use for cooking.Use a syringe or dropper,place some drops into it's open beak.Don't put it too far into/down their beak,some will run out,but when you see them swallow,you know some is going down correctly.
I find the easiest way for me to do this,is to sit on my sofa,holding the bird with my legs,so it isn't on my lap,it is sat on the sofa but I can keep it fairly still.This way I have a hand free to open beak,one to administer olive oil.
They do seem to like olive oil,will sometimes drink it themselves from a teaspoon,then massage the crop.This will often sort the problem.
If it doesn't,you need to tip the bird upside down,so it's beak is facing downwards and massage the crop(after another dose of the oil)so you sort of make it sick,only it isn't sick,'cos it hasn't come from the stomach.It will be some grass,or straw that has been eaten,in the crop sort of coiled round blocking the exit hole.Causing pellets and other food stuffs to not be able to pass through.
The tipping upside down,is daunting if you've never done it,it is better to be shown by someone.I haven't needed to do that yet myself.
It would be a good idea,when they've gone to bed to pick one up,and feel a full crop,then in the morning feel again to feel an empty chook.This will show you how they feel,and help you in future,if you ever have a crop problem.
If need be,contact a vet,a poultry vet will be able to treat the bird,and,show you how to administer oil or medicine,and the tipping/turning upside down.