Have a 6 month old female purebred GSD and ears are up, down, one up one down, etc. Looks like she has lost most or all of her baby teeth. Take her on walks and has plenty of chew toys to stimulate the ears. We also have a 4 year old female GSD we got from the same breeder and her ears were up maybe in 5 months. Since they have been going up and down, should we be concerned that they are not up yet? It seems like people are commenting if they are not up by 6-7 months they may not go up. Looking for suggestions. TIA.