Last year was the first time in many years I have fed my bees a pollen substitute - I made my own from soy flour. I was actually quite surprised when they seemed to use them right up. Many years ago I used patties and the bees pretty much ignored them. Of course last winter here was quite cold by our standards, so that probably had a lot to do with it. This year I bought Mann Lake Bee Pro patties. I am unsure when to start putting patties on for the bees to use. It has been quite a warm end to the year and there is a small amount of natural pollen coming in to the hives. What are the rules for feeding bees pollen subs ?