Well it's not true that a Boxer pup can't be cropped after 9 weeks of age; however, it it advisable not to do it after 12 weeks because the ear cartilage starts to change. If it's not done before 12 weeks then you stand a good chance of the ears not standing. As they teethe and then grow adult teeth the cartilage changes. The aftercare is the hard part, and it honestly can take up to a year to get them to stand properly. I do not choose to do it, and I prefer the floppy look, but to each their own. She has gained weight and looks appropriate for a boxer puppy of her age. I just hope everything goes okay but DO the reasearch on the ACE, it could be harmful to her. I hope the vet does a good job, I have seen some really bad ones. Boxer's certainly aren't mean, they are wonderful. Good luck with that.