Droopy is in the Old West in 1955's "Deputy Droopy". It ended up being Tex Avery's last go-round, as he shares director's credit with animator Michael Lah. Avery also is the voice of Droopy in this one. One must assume that Bill Thompson was over at Disney around the same time recording J. Audubon Woodlore's lines for the Humphrey Bear cartoons there.
Daws Butler voiced the sheriff and the outlaws in one of the better entries in the series.