eat your young 

Behavior exhibited by experienced professionals that bullies, mocks, or demeans newly graduated individuals without experience. The practice is not constructive and results in young professionals quitting. The phrase is often used by Registered Nurses to raise awareness of their high turnover rate of the newly graduated. The symbolism is based on animals like rodents that eat their young for subsistence.

Don't eat your young otherwise there won't be a new generation to do the work

eat your young by skir January 1, 2021