小雌馬

小雌馬（Filly）是對於雌性幼馬的稱呼，以與成年的雌馬（英语：Mare）區分。在大多數情況下，小雌馬是四歲以下的雌性馬；但在部分國家的賽馬界中，例如英國和美國，小雌馬的界定為五歲以下。^[1][2] 雌性幼駒通常在二歲時性成熟，並擁有生育能力，但一般來說，她們在停止生長前（通常是四至五歲）不應生育。^[3]

不同年齡的小雌馬

剛斷奶的（英语：weanling）雌性溫血馬（英语：Warmblood）

一歲的（英语：Yearling (horse)）雌性阿拉伯馬

兩歲的雌性純種馬

三歲的雌性阿拉伯馬

參考文獻

1. Hammond, Gerald. The Language of Horse Racing. London: Taylor & Francis. 2000: 79. ISBN 1-57958-276-1. OCLC 44923115. 
2. Privman, Jay. Zenyatta completes perfect season. Daily Racing Form (Breeders' Cup). October 24, 2008 [September 7, 2011]. （原始内容于2012-03-29）. It was the perfect end to a perfect day by a perfect filly. Zenyatta, the best older female horse in the country, completed a perfect season. . . by winning the $2 million Ladies' Classic on Friday at Santa Anita's Oak Tree meeting, the first of two days of the 25th Breeders' Cup championships.  (Zenyatta was foaled in 2004, making her a 4-year-old at the time.)
3. Ensminger, M. E. Horses and Horsemanship: Animal Agriculture Series. Sixth Edition. Interstate Publishers, 1990. ISBN 0-8134-2883-1 p. 149-150