I have rehomed a quiet Gorgeous 5 year old dog. I live with a friend who has a mixed breed who has been only dog for 3 years. Old dog is very jealous and barking at my new dog. Am giving them treats at the same time, walking together. Old dog is sniffing her, my girl not that interested. I’m hoping things will get better as it’s been less than a week. I have her in my room at night, tonight old dog got in, jumped in bed and barked in her face. Any advice please?