From Wiktionary, the free dictionary
From fowl + house.
fowlhouse (plural fowlhouses)
- A building for keeping fowls; a henhouse.
1930, Norman Lindsay, Redheap, Sydney, N.S.W.: Ure Smith, published 1965, →OCLC, page 10:"Where's you Uncle Jobson?" he exclaimed. "In the fowlhouse," said Peter.