Thoughts on Animal Testing

I think some animals should be treated differently because some animals could be harmless like a dog or a pet of some kind. But other animals like a bear or a lion should be treated with more caution because they are more dangerous. I don't think we should test on animals because we could possibly harm the animal and if we continue to, we could possibly make the animal extinct. I think if we tested on mice we would really affect our ecosystem since birds and snakes eat the mice and "pests" and if they don't have a meal the snakes and birds would die out. I think it would be okay to test the drug on an animal to see if it would actually benefit us. Or maybe it would be tested on a person who would be willing to be tested on instead of an innocent animal. And I think the probability of the drug would matter as well to see what the chances are of possible death.