Who will not feed the cats, must feed the mice and rats.
More German Proverbs:
He has given the hen for the egg.German
A bad cause requires many words.
German
Every one basteth the fat hog, while the lean one burneth.
German
In the evening one may praise the day.
German
Care brings on grey hairs, and age without years.
German
Drink makes you forget your sorrow; but only, alas, until tomorrow.
German