My German shepherd is 18 months old and bites everyone but in a malicious way but everything are bites. Her 1st 10 months she stayed with my parents because i left for work and they basically had her in a kennel or in the backyard for her pooping n peeing only no other interaction unfortunately😡.She's with me since then but has that horrible habit of biting all the time and gets carried away especially playing with her. responds to basic commands but shes away trying to get your attention through bites. Outside she's cool but at home is the problem. I love her a lot and regret leaving her with my parents. I cant afford proper training and chew toys dont work for her so anyone has tips ?