WOW three Boxers??? That is an impressive amount of ... "Boxerish" for a non Breeder! But all Boy's ... LOL, your missing a "big part" of the Boxer experience.
The boy's are a piece of cake. IE ... eager to please, you! The girls ... not so much??? Way, way back in the day ... when I got Struddell ... I wanted a boy! Specifically, I wanted the boy standing on top of the pile of puppies barking his head off! Now that I felt ... was a dog! But all the males were take???
So I chose, the puppy that climbed out of the pile, came to me, sat in my lab and did not move?? And then mom came up and did likewise??? She planted herself next to me and did not move??? She climbed into my lap and promptly fell asleep???
I wanted a male dog but Struddell and mom ... chose me??? I remember thinking well this one is a "Ball Dynamite" ... "NOT!" But I wanted a "White Boxer! So screw it ... I'll take this one?? LOL ... that was "apparently" the only moment of calmness, in Struddell's life??
I do remember reading, the girls are different?? Rare among dogs ... in Boxers, the females are the more "Domaniate" of the two sexs?? Well whatever ... I wanted a White Boxer and whatever a girl it would be?? So I'll take this little White Boxer of Dynamite ... Not!
LOL ... I got "Schooled!" For all I know ... Struddell ... had actually been acting like an A Hole ... all day long??? And when I came over she was exhausted???
But after a day of rest .... I saw the real real puppy when I brought her home?? Pig headed and stubborn! Or as I am want to say, "well whatever it is you want me to do, is not as much as fun as what I want to do!" Mr Toads "Wild Ride" ... here come!!
Now with my first GSD ... I got sandbagged??? But my first Boxer ... I knew what what was up?? And I had read that the girls were uh ... different?? Pigged headed to the max! "Whatever it is you want me to do?? Is not as much fun as whatever it is I want to do!
I still remember .... whatever command, I was trying for, the upteenth time! And I could see the little wheels spinning in her head spin and "Boom" there it was! Instant compliance and from that day forward ... "Struddell" became a piece of a cake!
From that point on she was spectacular! But it was work to get there! In rescue work, with Boxers ... I always get males?? And whatever there issues are ... they are easy to train?? Pretty much spectacularly so far for ...me.
But I have not had the chance to work with a girl in rescue??? The boy's, want to do whatever makes you happy! The girls want to do whatever makes them happy.
It does seem to be a thing?? And the only Boxer I have met that you would not want your dog to meet in a Dog Park (which I don't go to) ... was a Girl!
She was a "Flashy" and safely contained behind, a fence on leash with owner present ... she stared at "Rocky" ... 116 lbs of Male Over Size Working Line GSD ... like he was "Raw Meat! I was stunned??? Long way of saying ... the girls are different???
But whatever ... and even though as a general rule I like big dogs. My next bigger is stil gonna be girl! i find them kinda cool!