Mako (11 wks) had his DHPP and deworming done yesterday. Since then, he doesn't seem to have much of an appetite and I noticed that twice he's gone out to pee and he gets in position and nothing comes out. Both times he's come back in the house and urinated about 10 minutes later. He did a sort of walking dribble of urine on the kitchen floor (he didn't even try to go off and do it descretely), and I've never seen him do that before. Could he be having side effects from the shots? Should I be concerned?