I have a male English Springer Spaniel (show breed) that weighs 9 lb 8 oz at 8 weeks, 6 days old. He was puppy 10 born of 11 puppies. Does anyone have a growth chart or estimate at his adult weight? The parents are roughly 50 lbs, but when I put his weight above into these online calculators, it estimates around 38 lbs. Also, my vet just said to look at the parents. Please advise.