How can tell if I have a mule? I was given this Muscovy last summer and it has grown up with the others in the Muscovy pen but it seems to stay away from them some. It picks up Muscovy friends while out free ranging or another girls may be hanging out with it sometimes but I can't tell if it is boy or girl or if it is a drake mule. I have never seen it try to mount any girls like Herman, my big chocolate drakes does or Lance, my lavender drake is doing. However, it's face hasn't much caruncle as my others do at the same age, boys or girls. At first we thought it was a girl as the legs are not as thick as any of my other Muscovy boys, nor is it the size of my Muscovy boys. However, my Herman does not like it and will chase it back when they coop up at night and I have never seen Herman treat this one like he does his other girls. Do I have to wait to see if it lays an egg? And if it does, I know that will mean girl but then do I check for a bulls eye to see if it has been fertilized to know if it is a mule? Now this one is for sure a girl and is about 6 months older than the one above. But comparing the legs on both they look the same. However, the top two photos show the lack of caruncle and if it is a girl, why does Herman not like her? He loves his other ladies.