This is cookie 4 1/2 month old. Is it a hen or roo?

Shes suppose to be a hen but acts like a roo.my other hen began to lay a week ago.I also have a duck and a drake. All four lives together. Cookie is the leader.I sa her mounting the duck and drake but not the hen. Cookie is tall and has pea comb.wattles are smaller than my hen.but cookie has quite large earlobes ( bigger than her wattles ),long legs, pointed and thin hackle feathers. Can any one help with its gender. It's a country chicken BTW. Thanks

 

Here's one

 

And another

 

https://www.backyardchickens.com/content/type/61/id/7807534/width/200/height/400[/IMG
See this also

 

See from behind. Are u 100% sure?

 

Sorry some photos didn't get loaded.

 

Trying again...