Missing Cat: Black & White, Marangaroo Area

My Roy hasn’t come home for days which is very unlike him. Mostly indoor (only recently figured out he can push the big dog door open), 10 month old, desexed, black and white ds/mh. He lives in Marangaroo. Has distinctive white tear drop markings and was castrated not too long ago so still has shaved front legs from iv catheter and shaved sides. He has a rare heart condition so I am especially worried. Is microchipped. We miss our boy terribly and would given anything to have him home safe. 0449154252 (Caity) or 0419400762 (Max)