I've checked out dog growth calculators online, and they give me a wild range of possible sizes for my pup - 15-30 lbs. Hamilton is a dachshund mix, we think maybe dachshund and terrier, and right now he's 6 months old and 13 lbs. The vet says that since we don't know what he's mixed with, she can't say that he's not going to be above 22 or 25 lbs (Frontline and Heartguard weights!). I think it's really unlikely! He's growing maybe a pound a month at this point. Does anyone with more experience in dog growth rates have any thoughts on how big my stubby legged friend might get?