Most info from: https://www.space.com/33823-why-do-we-send-animals-to-space.html
I don't agree that animals should go to space because space travel is dangerous even for humans. Sputnik 2 was a suicide mission for the poor dog Laika , the satellite was not designed to come safely back to Earth. Unfortunate Laika died during her historical mission because of overheating. It is not fair to send innocent animals in space especially because there is a very high chance they will die soon after or during the space mission. It is selfish for humans to do this to animals who don't have a choice in the matter.
What do you think?