What are the disadvantages of feeding crabs for a long time?

Feeding high-protein fish and shrimp and other bait for a long time in the stage of cultivating crab seedlings is prone to precocious puberty, resulting in old crabs and a high proportion of second-year-old crabs. It is suggested that meat and vegetables should be mixed in spring and summer, and high-protein fish and shrimp should be fed after the dewdrop temperature drops and the hulling is over, until the water is released and the seedlings are put into the wintering pool. Provided by Panjin Erli Eriocheir sinensis seedling base.