Identity Crisis

Help I need a pet behaviourist! Maxy, our Italian Greyhound thinks he is a cat. He jumps through the windows like Whiskey and Brandy, the two cats we have at home. He is often seen lying with him or grooming them. This is fine up to a point but yesterday tops it all. He was seen trying to get personally acquainted with Brandy who just stood there with a look of amusement on her face. Whiskey shown here with Maxy is still a bit shy of him compared to Brandy who plays with Maxy like they are the best of pals. I think Maxy needs to spend more time with other IGs. Are there any out there in Gauteng that are looking for a playgroup?