Lost Pet: Spooky

Circumstances

Spooky belongs to my 9 yr old daughter. We have had him for 8 years now. He is an outside/inside cat and always returns home, however this passed week he stopped returning home after we lost his sister to kidney disease. He is very confused that she is no longer in the home. We need to find him! 

He has a clipped ear from his nueter, and a nick on the other from an incident with another cat. 

He is very loved at home and means the world to us. Please help us find him!