Awww
you did your best, which is all anyone can do. Poor shrews do come in for a battering, as cats on the whole dont think they taste very nice ....
I took a tiny fieldmouse from one of my cats, once, in the days when I had young, outside cats.
The poor little mouse promptly died in the middle of my hand - it barely filled my palm
Its hard when cat-nature and human conflict
Lets hope the shrew stays safe