This is actually a good video that demonstrates how a seemingly innocent product can end up being life threatening without proper QA.

Also a tip for startups, pet owners are willing to pay premium for convenience and their pets health, and the market is huge for automatic litterboxes, pet feeders, grooming etc.

That cat guillotine simulation at 5:10 is sobering: https://youtu.be/xepC3-Ia9ho?t=310