Calcium should be supplemented in time, and more sunshine is helpful for calcium absorption and bone growth.

After four months, if you still don't erect your ears, you can choose to erect your ears. You can wrap tape around your ears several times and it will stand up in half a month. Try to erect your ears naturally. If you are a purebred dog, you don't need to fix your ears deliberately, just add more calcium. If you want it to stand up quickly, you can tie it with medical tape, but I suggest not. It's easy to cover your ears in hot summer!