The man pushed the dog in front of him and while the dog was walking he broke through the ice and the dog got his legs wet and they froze.
After the man and the dog get wet from the water he builds a fire to warm them up. He built the fire under a tree and snow fell off of it and put the fire out.
After the fire went out the first time he knew he had to build another one or else he would die. He went to go build another one and dropped the snow and it went out so he wasn't able to build another one