When I eventually persuaded her to let me take a look I found an open wound under her fur on the inside of her right thigh. It was clearly going to need stitches so we had no alternative but to take her to the emergency vet.
The vet took a look and explained that she would need a general anaesthetic as it was the only way she would be able to keep her completely still, so we had to leave her there.
A worrying 4 hours later we got a call to say that we could go and pick her up. I was so pleased to see her but it was awful seeing her feeling so sorry for herself!
When we got home we settled her on the sofa - she was still very drowsy so she slept for a good couple of hours. After a couple of hours we gave her some scrambled egg and rice - she was hungry!
She had a reasonably comfortable night, even wearing a buster collar, and today has seemed a little brighter. She has even been wagging her tail!
We are going back to the vet tomorrow for a check up so fingers crossed that she is on the mend!
Here are a few pictures of her wound: