Alone, the cats didn’t care one bit for the ball. Oh, they would watch it roll by but once it stopped they would wander off so I put some of their food in it instead.
That earned it a sniff but nothing more.
With treats in it they were interested enough to sniff it but still weren’t peaked by it at all.
Oh! He’s going to play with it!!
I left it out for many, many days, trying to entice they with different mixtures of food, treats, etc. Nothing seemed to get their attention. It just wasn’t the hit we was hoping for.