Meaning of the word "many a good cow has a bad calf" in English

What does "many a good cow has a bad calf" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

many a good cow has a bad calf

US /ˈmɛni ə ɡʊd kaʊ hæz ə bæd kæf/
UK /ˈmɛni ə ɡʊd kaʊ hæz ə bɑːd kɑːf/
"many a good cow has a bad calf" picture

Idiom

a proverb meaning that good parents can sometimes have children with bad character or behavior

Example:
It's a shame about their son's behavior, but many a good cow has a bad calf.
Don't blame the parents for his crimes; many a good cow has a bad calf.