3 months may be pushing the limit by a bit, cropping should be done ( depending on the length about 9-12 weeks ) but your best bet is to find a Vet in your area, and get Rocko in PRONTO!! An experienced vet will let you know it the ear is too set already, The ear leather, and pina may not be suitible for cropping..ect..they know their stuff, and depending on the set of the ears..will advise you on the time frames allowed for your dog. Just FYI..I have had pups cropped at exactly 9 weeks, and Ashley was done at 13 weeks ( she has a full show crop, and just simply wasn't ready till then.
Best of luck, let us know if you can still have it done..and PLEASE don't let them talk you into a SHORT pet cut..I have 3 boxers in my neighborhood that never had enough "length" left and grew massive male heads, that make them look awfull..poor babies!
Samson has a very short crop, almost like a Dobie, DO NOT get that...Odin has an awesome crop, it's a shorter show crop and looks great...Do a search on here for "odin's ears" there is a great post on it with pics....I agree tho, you need to get it done ASAP
Pet cuts are done when your not planning on showing your dog, and want little to no maintanence ( Still can be a hard few months though..don't get me wrong..cropping involves dedication by the owner to achieve stance!! ) SHORT pet cut..well think of how yor baby will look at 2 years old, and has the ears of a Pit bull ( nothing wrong with that for a Pit..but it really looks awfull on a Boxer IMO ). Remember, you have ALOT of growing to do for your pup..and males heads usually are quite ummmm large...Ask for PICTURES of the crops the Vet does..it will give you a better idea of how you might end up.
Also, if you look online at Boxers, find pics that you like, take those in to your vet....One final word....Make absolutely certain that your vet does not use ACE as a sedative..If he says he does, either make sure he doesn't with your Boxer or find another vet....There is a Sticky topic regarding this and actually this info should be in your Boxers medical records at your vets
A crop is ONLY as good as the Vet who is doing it. IMO photos of other dogs IMO are not as good as seeing the crops that he/she has already done. Its like going to a hairdresser with a pic saying - make me look like that. If you are selecting a Vet that has done a crop you like, then you get a higher precentage of getting that crop rather than showing up with a pic.
Also IMO you are at the tail end of the age for a crop, so get some info as well on proper aftercare!
Show crop is a very long crop..You need to get some pics of what you are looking for. To go in blind is a huge mistake...Angel has a show crop, very long ears and Ashley has one at well...Odin's are a wee bit shorter which is what we will more than likely do with Flick