Bless you for doing that! Just an idea on the vet bills -- is there anyway you can call the Humane Society to see if they could do a reduced or free checkup on her? I'm wondering considering the circumstances if they would be able to help!
Also, I'm sure a rescue could take her in and afford her vetting if she can't otherwise find an appropriate home.
Seriously, you are such a good person for doing this. Many would have walked away and just left them to have god knows what happen. *big hugs* to you and if you need anything at all please feel free to pm me. I'll help anyway I can

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Give that little baby big hugs from us!!