Bonkers over the Kong ball

The most coveted dog toy in our house is now missing. I have searched and searched. The two dogs each have the coveted black Kong ball but now there is only one and Romeo is determined to keep it in his mouth. We have three extra large Kongs and three gigantic monster sized Nylabones, they never get lost. But we had only two black Kong balls the size of tennis balls. So I will get two more and then we will have three and maybe the missing one will show up. Unless it was accidentally dropped in a rat hole in the backyard. This has happened once with a Nylabone so we usually prevent the dogs from carrying the toys into the yard. It might show up if I stop trying so hard. last time I couldn't find a toy I asked ROMEO where's your toy? And he went and got it! It was under the chair.