sometimes i find that going high on various shades of a single color works after all when we tread with caution and don’t go over board. i do not know, but a loan places more difficulty on them. our beach and swim area is off limits to all dogs but there are other per friendly areas along the shore. you flip down the lid, then you push the eject button, then the disc pops out. if we all chip in a little bit, we can help them to make a big difference." in fact, they are perfect for the inside of your home as well. 