I agree with Ooby 100%. As soon as possible! It might even be a good thing to give a copy of the results to all vets involved, maybe they can learn a thing or two.
I'm reminded of something that happened to a falconer up here last October. The grounds maintenance that worked for his landlord came in to do some landscaping in his yard without prior notice or permission and sprayed a whole bunch of pesticides all over. He was at work at the time. Without knowing about the spraying he continued to feed the quail he'd been raising in his back yard to his gos and a few days later the quail began to die off and then he lost his gos. He placed the gos in the freezer planning on taking it in for a necropsy but wasn't able to get it done in time (either statute of limitations or been in the freezer too long, can't remember). If he'd gotten the necropsy done I'm sure he could have sued.