While taking my 8 month old jrt dog for his walk he always starts off with a solid bowel movement,which as a responsible owner I can scoop and dispose of.But after that he does numerous others which get thinner and more liquid as the walk goes on.I have tried different foods,I have wormed him I have walked him at different times but to no avail.On occaisions when I can't take him out because of 12 hour shifts he stays in his pen and only produces solids.I am at my wits end please help.