I'm pretty sure it's "vache heureuse."
It is feminine.
Happy cow can rhyme with a lot of things. You can say happy cow is a big Sal.
Cow manure is "le fumier" (masc.) in French.
To say "happy Wednesday" in French say bon mercredi.
The little cow is "la petite vache" in French. The calf is "le veau".
In French, the word for "cow" is "vache," which is feminine. Therefore, when referring to a cow in French, you would use feminine articles and adjectives. For example, you would say "la vache" for "the cow."
vache sacrée
You can say "Je suis ravi(e) de l'apprendre." to say "happy to hear that" in French.
If you wanted to say cow in Italian, you would say vacca. To say cow in Spanish you would say vaca. To say cow in German you would say kuh.
to feel happy is 'se sentir heureux' in French.
heureux
the sound of the mooing cow is written 'meuh' in French.
"Bonaniversè" is how you would say Happy Birthday in Louisiana Creole French.