last chance for the Bush

I have a bush? that is being eaten by something, no sign of the usual suspects, except tiny moths.
I have tried a few things including some bug killers with no sucess. Any suggestions?

 

Looks like it could be caterpillar damage to me.
I see you have some new growth coming, maybe that wont be affected.

 

Sawfly larvae like small caterpillars. They will have gone by now so don't spray. The bush will soon recover and put out new leaves. My spindle is similarly eaten, but new leaves are coming out already and those are untouched. It will be ok - honest! :D