In my dream, I bought a dog from a local adoption agency. It was medium-sized and had fluffy, white fur. It looked a lot like my grandma's long-dead westie, Polly. My dog was named Snoopy, which is the name the shelter had given it. Soon after getting Snoopy, I took him to a weird lake that was very deep with almost see-through, blue-tinted water. He started playing with another dog in the water, and in my dream I was swimming underneath them in the lake, somehow able to breathe and see perfectly. For some reason, Snoopy swam to the bottom of the lake. I swam down with him, and I saw a fluffy dog that looked a bit like a chihuahua, lying on the sandy lake floor. It wasn't moving, and I knew that it was dead. My dog gripped the dead dog gently with his teeth, and carried it to the surface of the lake. I swam up too, feeling slightly revolted and disturbed as to why there was a dead dog at the bottom of a tranquil lake. My dream ended there.
I sort of felt "chilled" when I woke up... I don't usually have dreams like this.