Well, it appears we may have made a teeny mistake on the gender of one of the chickens... yes, it appears Patricia is either a full blown Patrick, or is currently sitting on both sides of the fence (is that possible with a chicken?)
The symptoms:
1. She runs at you flapping and gobbing off. I thought she was just being friendly, but read on...
2. She glares at you - tips her head on one side and glares with one beady eye. Its quite challenging lol.
3. She jumps on Myrtle and Gladys backs and bosses them around. They tend to hang around together pathetically but quite amicably - if they come near me she is straight up.
4. She's huge and has one of those hat things on the top of her head.
5. She doesn't seem to have spurs - but seems to have stumps where they should/would be
6. Mollie reckons she crows at her

I slept with the window open all night last night (freezing) to see if I could hear her crowing in the morning - they are in their little house across the field - but nothing...
So, is she a gender bender chicken, simply dominant - or do we have ourselves a cockeral??! She is still young, very funny and actually not particularly aggressive...but she does seem to have some considerable nerve. For a chicken.