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:
- When the cat is away, the mice will play
- The cat shuts its eyes when stealing cream
- Dogs that put up many hares kill none
- The dogs bark, but the caravan goes on
- Every dog has his day
- A good dog deserves a good bone
- Every dog is a lion at home
- Dumb dogs are dangerous
- A shy cat makes a proud mouse
- Let sleeping dogs lie
- It is enough to make a cat laugh
- Better be the head of a dog than the tail of a lion
- Love me, love my dog
- Like a cat on hot bricks
- Every dog is valiant at his own door