allot of it depends what your feeding-and the amount of sugar in the patty
my bees will eat a one pound patty in 3 days if they are flying-but i also got some latest greatest stuff supper high protein -and they barley eat the stuff- by using less sugar that boosts the protein % up -what are you feeding--RDY-B
the ground rule is that sugar must be 50%. Otherwise patty starts to ferment, or takes blue mold like home made fruit jelly.
Sunny weather speed up brooding 100% compared to rainy week.
Willows have about 15% protein. When bees get better and multiflower pollen outside, they stop patty eating.