Had a friend who ran a dog shelter in LA...sure, there is some abuse, but there are also perfectly legitimate reasons to foster out a dog temporarily. Health and housing issues are a couple of the top ones. People might lose their house and finding an apartment or even a rental house that allows dogs is difficult.
I don't think a -8 would be the best choice for transporting a dog, but when mine converts from an assembly of parts to a real airplane I'll be happy to give it a try. Probably a better passenger than my wife...and I hope she doesn't read this.