I don't know what it is about these particular mice, maybe it's the colors, my cat will not play with the lifelike looking ones. I place them strategically around the house, and every evening he finds one, carries it to the kitchen to bat around awhile (he knows not to put them under the refrigerator), then, with mouth full, carries it to our bedroom, crying the whole way, dropping it then lying next to it. Every night! Sometimes the hallway is littered with them the next morning. I'm planning on buying more.