I have 9 cats 2 indoor and the rest indoor/outdoor I tend to go through a lot of litter having to change it out weekly and it gets disgusting if it doesn't get cleaned every day Pretty litter seems to just eliminate all urine I can see it after month but it is actually a lot cheaper not having to clean the litter box as much and only changing it once a month 1 bag pretty much fills a litter box with just a little bit left over having it show up every month reminds me of to change it I highly recommend it really is worth the price and in the end ends up being cheaper for me