No I don't think they should treat animals the same way. No because a mammal shouldn't be treated the same way a insect should be treated.
Depends on what they are testing with. Like if it is causeing pain to the animal then they shouldn't do it. But if it doesn't they I guess it's fine.
It's fine if it's to a mouse but it's different if your doing it to a dog.
Yes because peoples live are more important than animals.