No, it was the other way around: Zeus turned her into a white cow. Her name was Io.
a white cow
That would be Ino.
Io
Zeus turned the nymph Io into a white cow to hide her from his wife Hera, who was jealous. Hera ended up discovering the deception and had a fly sting Io, causing her to wander the earth in distress.
She was the water nymph Io, after whom the Ionean sea is named.
Zeus turned Io into a white cow to hide her from Hera. The hundred-eyed monster was Argus, who Hermes killed to save Io.
Io was turned into a cow so Hera would not know that she was Zeus's wife
Io.
Because cow is white
cow
Zeus's jealous wife, Hera, turned Io in a cow with a gladfly stinging her rump while the cow wandered.