Even so, if you kick a dog, you can still be prosecuted for animal cruelty even if you don't break any of its bones. Scotty's casual disregard for animal welfare is appalling! Even Kruge loved his targ.
In Scotty's defense, he was probably certain it would work. You don't just take the beloved pet of a noted historical figure who commanded one of Starfleet's first deep space explorers, saved Earth from destruction, amd helped found the Federation and send it through an experimental new form of beaming unless you are absolutely certain it's going to work. Even after it failed, he did feel bad about it, so it's not like he's an animal hater or anything.