Pepper has a really sore part on the front of his neck where his collar has rubbed. I think it must have been getting wet and making it worse. After he went to the groomers and I could see how red and sore it had become. I have been leaving his collar off at home and it is looking quite a bit better,but I wondered if it was safe to use anything on it. Has any one else had this problem and how do I prevent it happening again.