I noticed that my chickens weren't depositing much overnight, and so I blocked of their food (to prevent any midnight snacking) last night. I didn't pick up much this morning either. And on checking, I found that two of them had full, firm crops, so I suspect a crop blockage.
I do have a poultry vet coming on Monday who should be able to help me unblock them if needed, but I don't want to wait until then if they're not getting any food. I know I need to massage their crops, but am afraid of breaking them if I do it too roughly. What is the proper technique? And is it worth pulling them off the roosts when I get home tonight to do?