I was struck with a sudden inspiration! Why not use old deep fryer oil to make my own winter seed and fat delivery system? We use pure lard (clarified oinker blubber) in our deep fryer (great for building up massive arterial blockages and myriad other vascular occlusions) and we will shortly be replacing the contents with fresh and I reckon the old oil might just be ideal if loaded up with corn flour, BOSS, layer pellets/crumble etc etc. Has anybody else made such a thing out of used lard? Did your flock begin to small suspiciously like french fries?