I just don't understand?

[M.a.m.a.s. Gurl 07]

I love dogs very very much.Over the last two years I'v had over 7 inside dogs & 3 outside dogs. All of the dogs my mom has made me get rid of. I don't understand . She says she loved them , but she made me give them away my favorite a Sport a chi. we had for two1/2 years. He was my baby , he slept with me and followed me around ,he kept me company during bad stroms(i hate lighting), and he was the the highlight of my day. One day I came home and some one was at the house mom told me she was there to get sport,I started crying and she asked me if I'd rather give up Trouble ,another dog I had at the time that she later got rid of, I said yea. The lady wanted sport though. Iwas crying the woman even said she would let me keep him if I stopped crying but mom gave him to her. I was so mad I didn't talk to her for 2 weeks.When I asked her why she said he wasn't house trained, but he would go if you took him out and she doesn't work ,so i didn't see the problem.
Then a year and 3 dogs later she got a puppy named cotton I fell in love and over the summer she gave him away too.He is my baby and I love him! I cried and thought of Sport. Now she's told me I have to get rid of my G.Dane I've had for3 years. This is breaking my heart ,why is she doing this. Every time it storms i get mad about it , and it storms alot here! What should i do?