Thanks for all your replies =D I read a couple of other theads that mentioned this NatureDiet so I think I'll give this a go!
Unfortunately she doesn't chase a ball, or will and then give up halfway and decide the tuft of grass is more interesting! lol
I'm feeding her on the adult James Wellbeloved, we used to feed her on Jack & Joe's from sainsburys which was amazing but they stopped doing it

Thanks Terri for the advice about the diet food, they did reccommend something though I don't know what it was but I think if there's nothing wrong with the dog than surely they can eat normal dog food?

And thanks Aurora for the veg idea - I feel so bad not giving her a treat sometimes but to have something healthy to give her will be good

Oh and does anyone know if liver is fattening? I see a lot of reciepes for liver treats but I'm not sure if that's just taking a step backwards lol

Thanks again for everyone's replies, much appreciated!

Catharine x