We learned from the SARS epidemic that there are no naturally occurring animals that match humans in terms of receptiveness to the virus, direct symptoms, and immune-enhanced damage. Here are a couple of articles that explain better than I can:

https://www.statnews.com/2020/03/05/coronavirus-labs-scrambl...

https://www.statnews.com/2020/03/11/researchers-rush-to-star...