I have owned my mare for about 3 weeks, she is my first horse so I am very new to this. My instructor told me she is in season and so is the mare she is paddocked with. It is very early in the season for this (still the last month of winter here but we are starting to get some longer warmer days). Why do you think they have come into season so early? Also what sorts of behaviour do other peoples mares have when they are in season? Mine is weeing in small amounts all over the paddock and on the other mare, it smells really strong too. Also she and the other mare are in love with each other and whinny constantly to each other when separated. Their ground-manners are good so this hasn't caused too many problems. How long do they stay in season and how often do they come into season.