Thats about the age mine started teething. Pretty normal age so i wouldnt worry about that. Mine never started eating less tho so may want to keep an eye out and make sure she is still eating plenty. Ears often go down or droop when puppies are teething. They usually go back up no problem. In my experiences at least. My hairless chihuahua chinese crested mix... Her ears went straigt up and then when she strted teething one drooped and then went down all the way. Then the next ear did the same. I started to think they wouldnt go back but then one morning they were back up and have stayed up ever since.
I worked at a clinic for many years and seen the same thing with other puppies ears and teething
