pen and dog treats. when he returned, an empty pouch like this one was lying on the floor. >> looked all over. there were no diamonds. immediately, i knew he had eaten them. >> reporter: since honey bun wasn't talking, there was one way to find out. >> she came down, took him across the street. and steve ran x-rays. >> reporter: carbon doesn't show up on x-ray. the two blank spots confirmed honey bun was a likely suspect. it only took a day. and they found another surprise. >> next afternoon, sure enough, the earring back and two diamonds were recovered. no panic. >> reporter: honey bun was guilty as charged. but this pooch was granted a reprieve. >> i haven't scolded him to this day, and won't. >> reporter: why not? >> it was my fault for leaving the chair there. that's why. what a sweet baby doll. >> reporter: it taught roberts a valuable lesson. he's now very conscious about where he leaves his desk chair. and they're keeping a closer eye on honey bun, especially around the precious gems.