Since working with my local rescue, we have been called upon to put an age to some of the incoming dogs. I have been using the things that I noticed from my girl while watching her grow up to help narrow down the age of an incoming dog. And was thinking this morning that I really have no firm idea about the truth of my observations. So, I wanted to ask a couple of questions to the boxer experts on here to verify my guesses. I do understand that unless we know for sure the birthdate of the dog that we are just guessing I just want to make sure that I am at least in the ballpark and making the right assumptions. (the ages listed are just generalizations, an easy way to break up the age differences) Birth - 9mo's : These are usually easy to spot, they are significantly smaller and "puppyish" in looks. We dont usually get these guys into rescue unless it is through a pregnant momma. 9 mo's -1 yr. : Most of these dogs are determined by their behavior traits and a certain "puppy" look to their face 1yr - 2 yr : These dogs tend to have a lanky (leggy) appearance, their faces seem more "adult" looking, and their chests have deepened toward the ground 2yr - 4yr : These dogs usually have gained the girth in their chests, they appear filled out and have a distinct adult appearance to their faces 4 yr - 6yr : These dogs appear to be adults, they start getting a few "grey" hairs on the sides of the muzzles but are still quite playfull 6yr - 8 yr : These dogs have distinct greying in face, appear a little more laid back (sedate), you see slower movements when getting up/down, and they act a little more reserved. Another question that I have has to do with breeding pairs. I would like to be able to tell if a dog has been bred when we take them in (if possible). Are there either physical or behavioral cues? Males: Is it possible to tell if a male has been used as a stud dog or has bred at any time. From what I can tell, if they are intact and over 6mo's it is a good possibility, but that there is no way to tell. Am I correct? Females: WIth my own dog, she was spayed at 6mo's, her nipples have never grown since then (i.e. they are nearly non-existent) I can tell if a female has recently nursed, the nipples as well as the skin around the area is distended significantly. Some of the females we get in have varying degrees of distended nipples, is this related directly to nursing or could it be a late spaying? Thanks in advance!