NOTE: Sid Lethbridge 2023 - There was a hen made by US Glass with this base, which was also used for their Small Rabbit (OMN). The Small Rabbit does not appear in the 1898 or c1900 catalogues but does appear in the 1904 US Glass catalogue. There is no hen using this base in any of the catalogues. The US Glass Hen (aka) appears in this assortment from a 1900 Butler Bros. wholesale catalogue.
NOTE: Lianne McNeil 2023 - re Fenton Reproduction: As far as I know, all the US Glass ones have the bridges across the top of the tail (inside).