I recently had my Lab neutered and then about a week after the surgery he got deathly ill. He ran a fever of 105, wouldn't move, so my wife took him to the emergency vet and they took xrays and tests and so forth. They found no foreign objects in his stomach, no evidence of neurotoxins (from spider bites, they are in calfornia) or chemical ingestion. They think it was a blood infection of some sort. He was on IV antibiotics for a few days, now he is home taking meds orally. I'm overseas so I have no idea what is going on, anyone ever heard of such a thing? Could it be related to his recent surgery?