My gorgeous boy cat has been missing since yesterday afternoon. He was a house cat for the first 2 years of his life but I'd been feeling guilty and had started letting him and his sister out for short periods of time in the garden, never overnight. And yesterday he didn't come home. He's a shy quiet cat and I feel so guilty for letting him out. I've put his used litter in the garden, Notes through neighbours doors, called vets and made sure our microchip details are up to date. I've been out calling and rattling his treats. I am so sad and just want him to come toddling up the garden. Any other advice on what I can do?