Our goats start coming in heat when the sunlight gets shorter in the fall. In Alaska, we are loosing over 5 minutes of sunlight each day (September) and all four of the Red Fence Farm does are showing signs of being in heat. The doe will act and sound different than normal when in heat. The constant bleating and the wagging of the tail (flagging) are the most dramatic signs of being in heat. In addition, their milk production slows and their appetite wanes. When a doe in heat gets close to a buck, she will also stand close to the fence nearest the buck and not move. Take a look at one of the Red Fence Farm Nigerian Dwarf does in heat.