My dog, Misty, is an English Setter who is 6 years old. Recently, had her companion die. We don't want to leave her outside alone, so we want to make her an indoor dog. She doesn't have a huge problem with messing in the house, but she has a random aggressive tick. She considers me as her master. She does not snap at me. When my other dogs, Miley (schnoodle) and Bella (yorkie), approach me she will occasionally snap at them. She becomes seriously aggressive, growling and lunging and trying to bite. Most of the time she is fine with them, even playing with them. The biggest issue is she snapped at my girlfriend and brother. They would be petting her and all the a sudden she snaps. She bites to hurt not to be playful. She acts like she is spooked.
My girlfriend was petting Misty, who was laying on the ground between us. Misty had her eyes open and was enjoying the attention. Then my girlfriend shifted to get a better reach to pet her. Misty snapped and bit her breaking skin below her cheek. I got up and Misty instant stopped. I scolded Misty and put her in the garage.
I don't know what to do. I really want to convert her into an indoor dog, but she snaps randomly at least 3 times a day. If i can;t fix it she will end up having to stay outside.