We started with these based on the recommendation of the lady at the feed store where we bought our chicks. She told me that the older chickens will eat it if they are on pellet food. For the chicks, it does not seem to smell at all. I do change it fairly frequently, but not because it's wet. I am just worried about the little guys getting sick. The poo does dry and they pick at the pellets enough that some of them chip apart a little bit. Then after they have dumped some food into it, they can dust bathe in it. LOL Also, the brooder is in our living room so I don't want it to even start smelling. I have not tried the pine shavings because I was told that the chicks might eat it. Also, I was concerned that they would get it in their food and water. the pellets do occasionally get in their water, but they settle to the bottom and expand so I can just tip the waterer into the sink and rinse out the bowl if it seems like there are a lot. I change the water and add food every evening. I rinse out the bowl if it seems like it needs it.