Don't kill the golden goose.
What is sauce for the goose may be sauce for the gander, but it is not necessarily sauce for the chicken, the duck, the turkey or the Guinea hen.
Alice B. Toklas
A traveller at Sparta, standing long upon one leg, said to a Lacedaemonian, "I do not believe you can do as much." "True," said he, "but every goose can."
The fox remains always a fox, the goose remains a goose, and the tiger will retain the character of a tiger.
Oh, nature's noblest gift, my grey goose quill, Slave of my thoughts, obedient to my will, Torn from the parent bird to form a pen, That mighty instrument of little men.
The goose we retained until this morning, when there were signs that, in spite of the slight frost, it would be well that it should be eaten without delay. Its finder has carried it off therefore to fulfil the ultimate destiny of a goose.
Arthur Conan Doyle