To teach the dog to bark
Учить собаку лаять (т. е. ломиться в открытые ворота).
Ученого учить - только портить. Рыбу плавать не учат. Не учи плавать щуку, щука знает свою науку.
Другие пословицы:
- Beware of a silent dog and still water
- Every dog is a lion at home
- The cat shuts its eyes when stealing cream
- Curiosity killed a cat
- Dumb dogs are dangerous
- A good dog deserves a good bone
- Let sleeping dogs lie
- Every dog is valiant at his own door
- Dog does not eat dog
- You cannot teach old dogs new tricks
- Wait for the cat to jump
- There is more than one way to kill a cat
- Like a cat on hot bricks
- Love me, love my dog
- The moon does not heed the barking of dogs