I'm so sorry to hear you guys are having problems. At the time it was a scary feeling for me, as I'm sure it is for you guys. The oil/grease source isn't all that fussy. My girls enjoyed bacon grease, hamburger grease, fat trimmings from any animal, veggie oil (which I started out drizzling on their food before trying other stuff and then just used when I didn't have the other sources available), suet (from the meat counter or bird products), black oil sunflower seeds (with and without the shells) and I'm sure there's other things that aren't popping into my head at the time. It actually got kinda fun seeing what they would like - which was just about everything. The girls loved feeding time so much that I had them occasionally knocking the food dishes out of my hands in their excitement. You guys are going to have fun with what started out as a scary situation. I was fortunate to not loose any of my girls from this. It did happen to a much lesser degree from time to time after that, but I think the brunt of it was from them being newer to laying tied to weather and diet. Things will work out fine. Best of luck to you guys! Hug your chickens and let them eat some bacon grease from a spoon you're holding for me.