Well, my dog isn't feeling good at all and I have no idea why?

hi, it may be arthritis's in there since she got kick by the mule a while back, as we get older, all we done as a youngster was fine and dandy but as time sneaks on us we start to feel those thing that happened as we were young pains of old injury's that wasn't nothing at the time , is something now .good luck with your dog .