I've heard they aren't good with children. Is this true?

Many breed description books will list the Greyhound as being too "high-strung" to tolerate children. This is false. Most Greyhounds have a very calm disposition, and many of them are good with children, especially if they are raised around well-mannered children.

In general, any dog, of any breed, that has not been raised around children or has an unknown background, must be watched carefully. In any case, all interactions between dogs and children, no matter how trustworthy they are, should be supervised by an adult.