We have this still with our 3 and 6 year old, if we don't control them. Older one is fetch crazy, the younger loves fetch if the older one isn't playing. She only has eyes for her sister if they both are unrestrained. For everyone's enjoyment we play fetch separately. We can make her sit and not charge, but it's not relaxing, she's a very vocal girl.
"If there ever comes a day when we can't be together,keep me in your heart, I'll stay there forever." A.A. Milne