My two piggies chew on the bars of both their houses and their "playpen" alot, and it annoys the heck out of me. I have one of these Snak Shack Ecotrition Chew Logs for them. They hardly ever chew on that. I recently got them some small animal bark chews thinking that there was something about the log that they just didn't like. They don't chew on those either. I don't want to spend $11/$12 to have their teeth trim when they have "toys" to chew on. does anyone have any helpful suggestions?