My uncle recently passed away from heart problems two weeks ago. He had a German shepherd/black lab mix dog named Rookie. I ended up taking her. Rookie was with my uncle all the time almost. Even to work ( he was a truck driver) he had her since a pup and she just turned 4. So this is a big adjustment for her of course but im wondering how I can correct some things. For one shes a very protective/clingy dog she follows me everywhere I go through the house I cant go out of her sight. I left to go to town the other day and left her at the house but my boyfriend was with her so I didn't think she would freak out so much. He said she ran back and forth through the house for 30 minutes or so after I left But she just does this with me. If anyone knows how I can help her feel more relaxed being alone in a room that would be great 
I dont know if this second thing is possible to change. When me and my boyfriend are just playing around if she thinks he's hurting me or I'm hurting him she jumps up on you, and does this like "warning". she doesn't bite you straight away she puts her mouth against your arm and has her paws on you, ( usually chest or torso area) She makes direct eye contact and will sometimes do this low growl, if you stop moving she gets off and acts like nothing ever happened. I'm not worried about it just with me or him so much but im terrified she will do it with little kids ( nieces and nephews) when they are playing and I cant exactly keep her away from them all the time. If she bit any of the kids I would have to get rid of her obviously. All of the kids are 3 and under so they dont understand yet. Is there anything I can do to help with this behavior? I'm just worried because she's not a small dog at all shes actually a lot bigger than my pure bred German shepherd somehow. So she could easily hurt someone
Also a picture of how adorable she is 😂
I dont know if this second thing is possible to change. When me and my boyfriend are just playing around if she thinks he's hurting me or I'm hurting him she jumps up on you, and does this like "warning". she doesn't bite you straight away she puts her mouth against your arm and has her paws on you, ( usually chest or torso area) She makes direct eye contact and will sometimes do this low growl, if you stop moving she gets off and acts like nothing ever happened. I'm not worried about it just with me or him so much but im terrified she will do it with little kids ( nieces and nephews) when they are playing and I cant exactly keep her away from them all the time. If she bit any of the kids I would have to get rid of her obviously. All of the kids are 3 and under so they dont understand yet. Is there anything I can do to help with this behavior? I'm just worried because she's not a small dog at all shes actually a lot bigger than my pure bred German shepherd somehow. So she could easily hurt someone
Also a picture of how adorable she is 😂