5 month old frizzle bantam cochin rooster what I have done so far: withheld feed for 24 hrs, started ACV water, tried yogurt that he didn't eat, crop was not completely empty but started soupy feed mixed with ACV water. Crop was almost empty felt like there were little feed pellets swimming around in there. We did recently change feed from crumbles to pellets but none of the rest of the bantam cochins appear to be having any problems so don't know if that is a factor or not. Sour crop is making me crazy! I thought the rooster was doing better so I started feeding him again, small amounts of soupy feed mixed with ACV water and massaging his crop just in case there is still a blockage. This morning he is blown up like a balloon again and when I massaged it, there was a popping sound and then a nasty smell so I'm pretty sure it is sour crop. So I will withhold feed for 24 hours and he is getting water mixed with ACV at a rate of 2-3 TBSP per gal of water. What else can I do? I have not seen him drink any of the water. I realize the crop needs to empty once every 24 hrs or bacteria will start to grow so do I wait till it appears to be empty before I feed again? What if it's a couple of days before it is empty? I do understand whats going on but its not always black and white. I have also been massaging the crop area morning and night and other times if I can. He is still pooping, sometimes it's watery sometimes it's more normal looking. Thanks for your help!