When they didn't cure him, she gave him a few drops of arsenic every day, and washed the sore, and, indeed his whole body, with tobacco water or carbolic soap.

It was the tobacco water that cured him.
Miss Laura always put on gloves when she went near him, and used a brush to wash him, for if a person takes mange from a dog, they may lose their hair and their eyelashes.

But if they are careful, no harm comes from nursing a mangy dog, and I have never known of any one taking the disease.
After a time, Dandy's sore healed, and he was set free.

He was right glad, he said, for he had got heartily sick of the rabbits.

He used to bark at them and make them angry, and they would run around the loft, stamping their hind feet at him, in the funny way that rabbits do.