We have a rescue Himalayan female. She has always loved you to pet her head and neck, but never her sides or back. She gets mad and hisses and bites at you. The vet has not found any injury. We have had her a year. She is about 5 or 6 years old. We had to have her put to sleep and have her lion cut to remove hair tangles. Now her hair is long and tangling again, but she will not let us brush her.