I always tell people I would much rather deal with a ticked off adult bobcat than any raccoon. Raccoons are by far the most dangerous animal I work with.
I agree with what others are telling you. I am so sorry for your loss. My coop is chain link, and I had chicken wire stretched around the bottom...until I found that raccoons had been bending, and pulling the chain link apart! Never enough to get through, but I figure if they can bend the relatively heavy gage chain link, they can certainly break through the spider web thin gage of the chicken wire. I have since switched to a much heavier gage 1/2inch hardware cloth.