MS-5 Orange Designer Series Automatic Pet Door Collar

This collar is better than the original but still needs a few improvements

This collar is better than the original, older ones that are really skinny, but I still which High Tech Pet would make an even thicker, more heavy duty collar that would fit the door openers. I have large dogs who need a thick heavy duty collar and I hate that they have to wear 2 - one for the door and one for the leash. Also, I wish there was a larger (circumference) collar. the large one I bought is still a bit tight on my dog.