If the ear leather-fold is already setting in then there is really no use in trying to get the ears done. Some vets will not go over 16 wks, but then again some won't go past 12 weeks. As a breeder, we do ours 7 to 8 wks old.
This should be a really thought out plan before bring a baby in that your wanting to have the ears cropped. Good Luck!
I highly discourage pet people from getting ear crops. They just don't understand the taping process and the time that it takes to get the ears to stand. After a few weeks they get mad, and after a few more months they get frustrated and want to give up entirely. A crop that doesn't stand, looks worse than a natural ear.
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I have found its more WHO does the crop and the thickness of the ear. a bad vet can ruin any crop. my vet does cropping up to 4 months and they stood quite easily. if you dont know how to tape / Or you tape them wrong you can undo the natural fold and ruin them.ear cropping is an art and takes plenty of patience
Ok...lol...better late than never. ..oops, I mean my reply, not cropping. I like to do this at 10 weeks, the pup is big enough for anesthesia and young enough to work with posting for a good standing crop. One of my vets prefers to wait until 12 weeks. He does a nice crop and the ears stand nicely in about 4-6 weeks. Most of my other vets don't have strict timelines, but after 16weeks, your chances of a standing crop is about 25%. There is a YouTube on ear posting that's pretty good. If you're in N. Texas, southern OK, I can refer you to these vets. Hope my post isn't too late.