Hey /an/ my dad bought a dog about 8 months ago. He takes it

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Hey /an/ my dad bought a dog about 8 months ago. He takes it everywhere he goes but doesn't know how to train it.

Whenever I see her she would listen to my commands. Today my dad asked me to watch over her for about 2 hours so I took her on a really long hike then stopped by a friend's house to get her some water. The whole trip I had treats for her for whenever she listened to one of my commands.

When I started walking back home I was just down the street from my house and the dog decided to just try and run towards the house. I held the leash pretty tight and she turned towards me and playfully jumped on me. I told her to sit which she did then after a few seconds of sitting she just started biting at my jacket.
It got to the point that I had to pick her up and just walk her back home.

I put her in the backyard so she can still run around a bit but now she's just sleeping outside.

Does anyone know why the dog would just randomly go into a craze like that?