So I brought a dog home ,it was chained up in a back yard ,tall grass no shelter lil food or water,the house was empty and don't know how long dog has been there,can I get into trouble bringing dog home

You did the right thing. Idiots probably moved off an just left it there to die. You have a good heart, be proud of your self!! Don't know you but I am proud of you!!

I don't understand this question. Please get the dog help.

Depends if pwopke were no longer living there.