We put the baby mallard in a small aviary with the half-grown muscovy, and it worked.
( ( ( ( ( We ( put ( ( the baby ) ( ( mallard ( in ( a ( small aviary ) ) ) ) ( with ( the ( half-grown muscovy ) ) ) ) ) ) ) , ) and ) ( it worked ) ) . )
(ROOT (S (S (NP (PRP We)) (VP (VBD put) (SBAR (S (NP (DT the) (NN baby)) (VP (VBD mallard) (PP (IN in) (NP (DT a) (JJ small) (NN aviary))) (PP (IN with) (NP (DT the) (JJ half-grown) (NN muscovy)))))))) (, ,) (CC and) (S (NP (PRP it)) (VP (VBD worked))) (. .)))
The mallard and the muscovy shared the aviary. 
( ( ( ( The mallard ) and ) ( the muscovy ) ) ( ( shared ( the aviary ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN mallard)) (CC and) (NP (DT the) (NN muscovy))) (VP (VBD shared) (NP (DT the) (NN aviary))) (. .)))