Well all I can speak from is my experience with Miila. She was 1 when we got her and a total sweetheart. BUT she had to make her way in our pack and got more than feisty during the transition. Started biting me during feeding and when she wanted a toy, basically thinking she was in charge. Not on my watch... I got a LOT of help from many here and learned how to be the boss in ways I have never needed. !st thing I did was hand feed. Take a handful of her food at a time and sit with it in her hand. Basically teasing her showing that you are in charge of this and not her. When I was ready and she sat/stayed then I would have her do a trick like sit pretty, high five lay down etc before giving the handful. Did this for every feeding for a bit until I could see a change in her. Once I saw progress I would just start her feedings with a handful of being hand fed before allowing her to eat freely and then even still making her do tricks before eating when I stopped the hand feeding. Also make her take a break from eating 1 or 2 times (having her back up and sit and stay until you say she can eat again) once you stop hand feeding. Basically I felt like I was messing with her mind but it really worked. As for the toy issue I would take it and set it where you want and make her sit/stay in a place where she can see it and know that she cant have it until you give. Miila was attacking my other 2 pups for toys so I would take the toy from her when she had it and give it to them as if to show that they can have it whenever they want and she would just sit and watch them play/chew. When they finished up then she could have it. All of this was done with a careful eye so she didnt get a minute of backtracking in. Also the second she bites you submit, instantly. Put her on her back and lay across her chest with your fingers dug into her throat (not painful) in a way as if they are teeth. Dont let up until she has submitted and then wait about 3 or more minutes before getting up. When you let her up say nothing and dont acknowledge her at all. It took a long time and we all got bit a few times but eventually she got the rules down and now she is dang near perfect. Well as far as these issues go.

Good luck and be firm. Keep the consistency up because just like kids if she gets away with it 1 time you have set yourself back days of hard work.