My name is Ruby!

Hi, we have had Ruby for almost 5 months. We got her from a family friend who was in desperate need of getting rid of her as his dog was trying to harm her. We took her in, in consideration we could get her trained as an emotional service animal for our 4 year old special needs child. Ruby is very possessive (which is good and bad), as she nips our children, while thinking she’s protecting me. My children have no interest in her and she may be jealous of them, but she’s a very timid dog. We’re not sure how she was treated in her previous home, but we are very scared she might hurt our kids, thinking they’re going to hurt me. She is very scared of everything and will not use the bathroom outside if there’s a distraction, as she’ll bark. So much so, if any distraction, such as kids or other animals, get close to her, she will bark so much, her bark will crack and she’ll urinate. I’m unsure of what to do, and the vet recommended a distraction bag, and it still hasn’t been a success.