Tucker is 18 months (almost 19) and I am thinking he is a little small.. He is not skinny; no bones showing and all that.. But he is 23" at the shoulders and 58lbs at last weigh in. Is this small or average for a year and half? He gets a cup of food in the morning and a cup at night, and eats Solid Gold Wolf King. His dad is 74lbs at 4 years and I cannot recall the size of his mommy, though I know she was a little smaller. Vet never said anything about him being small, but then again I highly doubt he knows everything about every dog breed out there..!