Hiya
Thanks for all of your advice. I took her to the vets and she has put on weight again!!! Unbelievable. She is only on 20g (I think it's g) twice a day of her obesity diet which is absolutely nothing. She's ravenous the whole time and going into our bin and I came home to the load of bread all over the floor with chunks out. She never used to behave like that, but she is starving. Anyway, I got a laser light and our other cat (Rusty) loves it, but Badger, the fat one, she just moves her head around looking at the light and occasionally sticks her paw out to touch it when it gets close. She is so lazy! I played in the garden with her little bouncy ball for a good half hour yesterday but then I caught her eating my other cat's food. It's so hard to keep them apart. Here are some photos of them in the garden anyway, incase anybody is interested

They are quite cute!
onemillion_orelse's latest photos slideshow on Flickr