Dog charges phone

A man has attached a solar panelled suit to his dog to charge his phone. This man wants to charge his phone for free and does not want to waste his electricity in his house. He says: “the dog feels good and I’m feeling good”, and later he suggests that these solar panelled suits should be attached to farm animals, so they have harvest free electricity. I think a better solution would be to place lots of solar panels on the ground instead of on animals.