No symptoms, one minute they was fine, next dead. No marks or anything. My theory is hedgehogs. A few days before they died, I started seeing hedgehogs in my garden and witnessed one going right up to the bottom cage. I didn't mind this as they keep my slugs and snails down. But 2 days later one of my ferret kitts (13ish weeks) died. Thought nothing of it, until 2 days later, my best worker died. The next day, I moved 4 baby hedgehogs and one ?mummy? to the local hedgehog sanctuary. That night I lost the brother of my good worker. Since then, which is 5 days, I have not lost any ferrets and no