We adopted a 4 week old kitten after she was accidentally separated from her mom at 3 weeks. Now she is 8-9 weeks old and hasn't been with other cats for the majority of her life. She cries when left alone since yesterday. How do we reward her silence and not reward her crying when she is crying the majority of the time? As soon as someone walks into the apartment or wakes up she starts crying. She just got her first vaccination a few days ago and the vet gave her a clean bill of health.