Do you think she can take my dog?

my dads soon 2 be ex wife wants “her” dog back just because she knows how much he means to me. she got him 2 years ago but only kept him for about 2/3 weeks. she had been abusing him to the point where all you would hear was his little crying and it broke my heart completely so i talked to her after a while about how i can take him in my room so she could “ have a break” she agreed and after that she never did anything for him again. she even moved out 2x before and left him with me both times and even got new dogs (that she doesn’t have anymore bc she loses interest in them and gets rid of them). he’s under her name and i know she won’t put him under mine and has threatened to have someone come get him but i know shell do something to him or send him to the pound and he won’t survived there because he’s so scared of the world due to his abuse. he sees a stranger and he instantly pees and shakes and feels like they want to hurt him.. he’s only close with my dad, my friend, me, and my other 2 dogs.. and now she wants to take him away. do you think i’d be able to appeal in court or if i told the officers about everything if they come they’d let me keep him?
Do you think she can take my dog?
Do you think she can take my dog?
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