I cant believe she is asking for so little.
She’ll win.
99% of the time the owner of a dog is responsible for injuries caused by it. Even thought the laws don’t generally say it, dog bites are essentially covered by strict liability concepts.
Seems like a classic case of "intervening cause". Not to mention lack of foreseeability.
Dog bites are certainly not strict liability around here (Georgia). Standard negligence rules apply, and generally if there was no prior indication that the dog had a propensity to bite, no liability.
The Illinois statute may not apply here, depends on how it's been construed, but GA has a similar statute and it has been held not to impose strict liability.