A very belated Thank You to those who commented here or PM'd me about this story. I've not been able to acces the internet since the beginning of November which is why they delay in responding.
I had originaly planned to end the story with the two ponies being transported away to their new life, but I tend to like happy endings!
Hangman, I can confirm that every time I go to the loo or have a shower, I'm definitely "she" !!!