It is possible, but so is alien abduction. Assuming your blowoff container was filled partially with water/sanitizer mix, all should be well. I can't speak for Iodophor, but with Star San, you're probably safe for the first day or two. After that, it's probably a good idea to change the water out.
That being said, I have a recent batch that sat for 6 weeks with a blowoff in what I know was no longer viable Star San water. Star San generally lasts about 12-24 hours tops in my tap water, but this beer turned out great.
Long story short, try to avoid doing that in the future, but 99% sure your beer will be just fine.
Originally Posted by Catt22
I would never use a dead mouse in my beer. It's much better to use live ones. You could probably just steep a dead one, but live ones must be mashed. Actually, smashed and mashed would be best.