I agreedeuce's mommy said:As for the collar, Deuce still doesn't like it and he is 4 months. He will tolerate it now, but he scratches at it a lot. As for the other, I would take him to the vet to be safe. I noticed Deuce scratching and he started getting bald spots and he had mange. He is currently on meds to fix it. I wouldn't take any chances, better safe than sorry.