My brother rang this morning and told me milo has gone missing

robin has a cat flap but its always locked as he only lets the cat out while hes with them. He got up this morning and the cat flap had been broken open and milo and tinks food (which is kept by back door an cat flap) had been tipped over an was scattered all over the floor. Tink was hiding behind the sofa and milo had gone. Robin has been out calling him, put a litter tray and food outside but still no sign of milo. This is very out of character for milo,he never goes futher than the back garden and is never out for longer than half an hour at a time! Robin has rang around the local vets and is out walkin the streets calling him now. Please keep your fingers crossed that my baby goes home soon
