His Wife Is a Hen is a 1990 Soviet-era animated short by director Igor Kovalyov. This surreal short tells the story of man whose wife is a (somewhat anthropomorphic) hen.
The couple live a tranquil life alone with their pet dog/centipede hybrid in an apartment. The husband, however, is mostly unaware of the fact that his wife is a hen, despite her making no effort to hide it.
However, the husband gets an unexpected visit from a friend who finds the avian wife to be quite an unusual sight. The surprise that the friend has over the wife leads the husband to start pondering whether he should also reconsider what he takes for granted.