sitter. This fear could lead to unexpected aggression or behavior issues like accidents or not eating.
Cats are no exception. While some of them may hide from the pet sitter during the consultation, they will come out and sniff around after that person leaves. They will "remember" these scents when your pet sitter visits to care for them. This familiarity will reduce their fear when the pet sitter arrives and they may eventually come out of hiding during visits.