Anyone mind interpreting this for me?

I had a strange and somewhat scary dream earlier.

Here's the dream:

I was back in High School with my friends. We were in the school playground. Oddly, there were bulls and cows there and the playground itself looked more like pasture fields than a playground though there were other students there playing.

The cows and bulls were healthy-looking and the pasture was very green. Most of the bulls and cows were this variegated brown and white color. Anyway, one of the baby calves lost its way and started roaming about near the classrooms.

Thinking about its security, I went after it and caught hold of it. It was a normal size calf when I chased after it. However, as soon as I grabbed it, it turned tiny and I could hold it in my palms. It had also changed color. It used to be this nice evenly brown color and now it was black.

I tried looking for its mother. I didn't go towards the playground because I felt like its mother was on the other side of the school (there's another playground there.) When I reached there, I saw this black bull come forward. It had sniffed the presence of the baby calf. I thought it was its father. It was big and looked quite strong. I dropped the now-tiny baby calf next to it. To my utter horror, the black bull swallowed the tiny calf.

I burst into tears and I was inconsolable. I felt responsible for its death. I regretted not leaving it near the classrooms. As I was crying, another bull and cow approached me. They were the same color as the other other ones (on the other side of the school) i.e brown/white.

The cow spoke to me and said: "Beware of the black one. He is full of deceit." It seemed like the baby calf had been hers and she seemed sad but not angry at me.