My breeder rescued a 9 year old with it's ears down, and it had to wear a cone for quite an extended period of time (I can't remember why), and it's ears actually came up and stayed up - which was completely unexpected. It had something to do with how the cone was supporting the base of the ear and the amount of time that that the dog was wearing the collar...so they obviously can affect the ears and I would imagine they can also do some damage. I would keep an eye on things, and maybe try a different type of collar.