The last two orders, which were far apart from each other, I've found them to not be as thick and even the odor free ones have much more of a smell. I don't really mind because the smell isn't like rancid or anything... but he easily goes through a 6" in one night and pretty quickly if I don't take it away. He used to chew about half of it, if that, a night. Also, these are the thick 6" ones. I'm just disappointed in them I hate having to spend more for a better brand though... they're so expensive and I prefer to buy them in bulk.