CUTE ANIMALS, ASSEMBLE!

Pet beaver tries to dam up the hallway.
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“It is my programming to inconvenience you as cutely as possible.”

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A veterinarian would probably be able to get a cause of death. But, are you sure there isn't any poison lying around? Or, something else that might cause an adverse reaction?
I did show the body to a vet, ni money for autopsy. Just checked all rat posion. Zero chance they ate it. No vomiting. Just poop. Purple gums and blood in the stomach and no blood in stool. Large dose of rat posion is our thinking
 
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