Dear Toddy,
Thanks for your good advice. I'm pushing her away firmly as she's getting rather confident and following me and coming up to me in the paddock even though she's with her mum all the time. Yes I have been successful putting a collar on her. I approached this through her playing with it at first. Now i've started her on a lead rein very gently and lead her to her paddock with her mum in a rather indirect route as she goes from side to side of her mum and stops occasionally. i'm being gentle with her and she's got a sweet temperament. I'm about to worm her and also check her hooves as she seems to be splaying her legs in the front.
It's good fun and i see them both every day for about an hour.
Do you have a horse/horses?
Cheers