Squirrels have no particular love of Iris. This was probably a freak occurance.
If you planted it again, that is about all you can do.
Keep it watered if it gets real dry, until it gets its roots established, and it should recover and be fine.

Thanks for the advice. :)

I use a U shaped garden stake to support any iris my dogs dig up until they have had a chance to get firmly rooted again. Just carefully push the stake down over the rhizome. I remove it in the fall.