Odd behavior... in Pet Entries

I had one of those moments when I was sitting having my coffee the other morning, and gazing over the kitchen decided that I no longer liked the cabinet knobs.

There are 60 knobs on all the drawers and doors, and I decided to replace them all with a simple, round satin finish stainless steel. They look very nice, but Miz Delphine, our Bloodhound, has decided that they must be something special.

She is constantly sniffing at them, and on more than one occasion Lady Wife or I have caught her thinking about nibbling on one with her front teeth. They are indestructible from that standpoint, but why the fascination?