I want to start out saying hi to eveyone I am new to this board. I have a 4 month old boxer and we think he is skinny. I believe he is about 25 lbs. The reason my concern peeked is because on vacation we met a man with a boxer he said his boxer was 5 months and his boxer was like twice the size of mine. His weighed 48lbs??? What is common for this age? Thanks in advance! :-/