I adopted two lab puppies about 3 months ago. They were around 7 weeks when we took them home, and taken from their mom at 3 weeks. Right now we think they are about four months old and the vet says he dosn't think they'll get bigger than 25 lbs. Lincoln, my boy, is already 25 lbs, and Piper, my girl, is 23. Is this abnormally small, and are they really not going to grow anymore?