I don't have a good recommendation for the ball. But if you are not getting the desired focus level with food rewards, I think you need to scale back your approach. When a dog is not focused, he is usually in a situation where distractions are greater than his training level allows. Move back inside with no toys to distract and work on extending the focus there, when comfortable add distractions like toys. Once duration and compliance is satisfactory, move outside to a quiet back yard. Then a street, etc. I know it sounds like starting over, but sometimes a little reinforcement and praise and treats for great success are enough to get the dog back on track.
chris and clark (whelped 07/18/2008)