has got a prolapsed disc.... 
she was limping a bit yesterday, but not enough to make me overly concerned, thought she may have a bruised pad (couldn't see anything obviously wrong with it)
then when my dh got up this morning, he woke me and said she wouldn't go out with him like usual. (she sleeps at the side of the bed and usually goes with him in the mornings at about half 4 - he milks cows) but she comes back quickly (she's more of a family dog)
When I got up, she couldn't get up 
she was trying, but it was as if she had lost the use of her back end 
so i got the dc to school and took her to the vets.
They said 3 options - surgery (which just isn't feasible for us to even consider) and may not work anyway.
PTS 
or give anti inflammortories for a week or 2 and hope she recovers with some rest and nursing ( though very slim chance )
I am so so sad.... and she knows it too bless her. They have said she is feeling no pain ( she is basically paralysed and also on the painkillers/anti inflammatories) so we just have to keep our fingers crossed and wait and see.
anyone had the same thing happen? (hoping for miracle stories!)