My dog has chewed on all sorts of toys, and this one is NOT safe. I got the stegosaurus one for my 4-year-old lab mix today and she loved it...but within 15 minutes, there was blood all over the toy because the tiny raised parts had irritated and possibly poked her gums. I initially thought maybe that was just because they were sensitive (like how humans' gums bleed if they go a while between flossing) but then I noticed that the two ends of the toy were already chewed off, and she had ingested the tiny pieces. The instructions say that small pieces "should pass" and I was watching her so she didn't get any big pieces, but seriously...I wouldn't consider her an extreme chewer, but she was already biting off and ingesting pieces of this thing.