Yes I used Hay one year && it got to where the dogs would not go into their houses.. Well a friend said have you checked for mice & I said no.. Well come to find out that is what happened mice & other small bugs & ect was all into the hay.. Well I dump & cleaned the dog houses & put in Pine Shavings.. From there on out I am devoted to Pine Shavings.. No Dust - No Bugs && No Mice.. Also it keeps the smell fresh..