Genetics plays a huge role in how big or small your Boxer will be...If you look at all of our babies you will see a huge range..Look at Tuck's parents, grandparents, etc to see how they looked as adults..Boxers also go thru soome growth spurts and will continue to grow til about 18 mos, then they start to fill out, so keep that in mind....
As for the breeding issue, PLEASE read thru all the topics in the breeding section first..We all believe we have wonderful Boxers, myself included, BUT having a good temperment is not a reason to breed...First, have your Tuck evaluated by a competent Boxer person, be it a breeder, judge or a good handler, then get all the necesssary health tests done, Echo/doppler, Holter etc. then have a mentor to help guide you in finding a mate for Tuck. Every Boxer has a fault, none are perfect, so you want to breed out your dogs bad trait when looking for a mate..Ie: 2 bad heads do not equal a good head in pups...The breed standard does not specify a certain weight, it does say that the weight should be in proportion to the whole Boxer...