Pets react to changes in schedules of their guardians. You didn't mention what type of toy she was picking up. I would bet its a toy that your dad uses to play with Cleo when he gets home.

You may try and play with her, and show her extra attention. This may ease her mind, that everything is okay.

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Recently adopted by 3 cats: Jackson, Rosie, Fluffy; a dog: Eli; some fish, and my fiancee: Lynn (Vi Co Bi)