Just One Bite Bars. or the bucket o' stuff. comes in pellet packs. in fact, i need to order some more just in case. the first time i bought it, i had kept it in a paper bag in a back room in the house. i didn't even have to lay any out. something ate right thru the wrapping. i placed a half bar outside under the HVAC that sits on a cement pad. there's a gap in the foundation, a small hole where the little and big rodents must have been getting in the walls and attic. well, the half bar was gone by morning. I put a whole bar broken into big chunks under there again and those were gone next morning, too. i did that one more time and not all the bait was gone. Knock on wood, that was two or three years ago and I haven't had a problem since. So I am going to do some maintenance placement soon.