> Better if one adds liquid protein to that syrup and or some patties,

Hola, Juanse. Perhaps you could elaborate on that thought. 

Are there commercial products available in your region, or are you making your own products?

What would you say is the net gain of using supplemental feeding, can this be quantified?

For example, I saw one study where feeding supplements caused an increase of one frame of brood and bees on average, during the trial. So, one could work out the equation to see whether it's cost effective or not. (No, I haven't done the math).

PLB

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