A vet has detailed a crucial sign cat owners should watch for when guests arrive, as their pet could be trying to tell them something important. Millions of people all over the world choose to bring animals into their homes, with pets becoming cherished, essential family members. Cats rank among one of the most popular pet choices but, unlike dogs , their behavioural signals can be harder to understand . When guests pop round, your cat might opt to "hide" and stay out of sight. This can be part