Nyktophobiac

I had a nightmare. I was at my dad's place and was younger. It was winter so was chilly, with some ice and frost around. I was walking back up to the house with him after helping him in his workshop when I saw a deer between us and his house. It was horribly disfigure. Matted dark grey fur, patches of flesh torn, and calcified dark growths covering parts of its face and going down its neck. My dad stop me and told me to be absolutely quiet as he reached for his gun and took aim, then shot. It dropped without a sound. He hurried us inside. There was a small time skip. I was still younger, but this time my little brother was with me. It was still winter. My dad told us to stay inside while he worked in his workshop. I looked out the window on the door down where the shop was, and I saw a another deer. This one looked even worse, with more intense rock hard growths covering its eyes entirely and down to its sides, and large gashes on its neck. It looked rotten. I opened up the door a little to get a better look, and it lifted its head at me. I quickly shut the door, then looked out the door window to see that...it stood up on its hind legs and was sprinting. It was sprinting, but in a way that looked obviously wrong and inhuman. It wobbled and slightly bounced back and forth at it went, and held its front legs lifted up in front of it. It was freakishly fast, it cleared the distance from where it was to where I was in SECONDS. My dad's front door was broken so it could be pushed inward. I stood at it, readying myself to keep the creature outside. When it reached the door it started bashing its face and antlers, making an unearthly noise as it did. A mix of a bellow and a pained screech that reverberated through me. My dad saw what was going on, and hurried to me. He was carrying a cat. The cat seemed to have ran it off.