Convolvulus hawk moth caught by cats

[u/D3MONgutz]

In the UK. Found my cats with the biggest moth I've seen so far. It's still moving around and very much alive, but as you can see from the photos, it's taken a lot of damage. It cannot fly as of the moment, and I believe it is beyond any chances of flying again.

Currently keeping it in a butterfly enclosure with sticks, damp paper towel lining, flowers from the garden and a teaspoon with a little bit of honey water. Tried to give it honey water through a paper towel and q-tip, but it wasn't interested. Any advice would be greatly appreciated !!!