I would lose my temper at her. Plain and simple. What an awful person!
My goodness, i could not imagine ANYONE letting an animal suffer like that for a full day before going for vet care.
Too bad the other lady who gave the puppy away didnt research her "good home" more also. You gotta work with her occassionally, treat her with professional courtesy and thats it. You don't need or want someone like her as a 'work friend' anyways. UGH!