Tried it with mine, if it’s just lying there she gives it a wide berth, but if I drag it along on a piece of string she pounces on it. So I wonder if, when it’s just lying there, they think it’s a large “jobbie” from a very large critter that’s waiting to pounce on them! As any cat owner(?) will tell you, a cat’s behaviour is very logical, to another cat, not to their people!