Answer:
Yes they should.
Explanation:
1. We need some place to test our products, and if we use humans that could be lethal to us.
2. Evene from ancient times animals have the instinct to hunt and use one another. Carnivores aren't a new thing to our society.
3. Rodents only have a short lifespan anyways. They are R select animals and produce many at a time as well as dying quickly. The average hamser only lives 3 years.
