When was she on heat last? For the record antifreeze causes kidney failure not liver failure but unlikely to be the case here by the sound of it anyway. Did the vet do any blood tests? How is the dog now? Crapping and weeing? There is a pretty big list of possibilities until things can be narrowed down a bit, including nettle, overheat (can affect them even 2 weeks later) lepto pyometra obstruction etc etc etc probably all sorted now anyway.
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