Scientific testing on animals

I´m going to talk about different reasons for use or not use animals in the laboratorys.
I´m agree with the idea that to use animals in laboratorus for to do experiments with them for help to the sick people.
Because the people that are sick need new medicines for the recovery and if this medicine funtions with the animals, the medicines will function with the ills too.
But on the hand, to use animals for experiment is a little cruel because they also are living beings and they don´t deserve are treat so badly.
I think that the scientists ougth to look into methods for the animals don´t suffer so much.