Many owners describe their Greyhounds as '45-mile-per-hour couch potatoes'.Greyhounds live most happily as pets in quiet environments. They do well in families with children, as long as the children are taught to treat the dog properly with politeness and appropriate respect. Greyhounds have a sensitive nature, and gentle commands work best as training methods.Occasionally, a Greyhound may bark; however, Greyhounds are generally not barkers, which is beneficial in suburban environments, and are usually as friendly to strangers as they are with their own families.A very common misconception regarding Greyhounds is that they are hyperactive. This is usually not the case with retired racing Greyhounds. Due to their size and strength, adoption groups recommend that fences be between 4 and 6 feet tall, to prevent Greyhounds from jumping over them. As per most breeds being rehomed greyhounds that are adopted after racing tend to need time to adjust to their new lives with a human family. Many guides and books have been published to aid Greyhound owners in helping their pet get comfortable in their new home.