I tried teaching him in the past to retrieve a ball as it would be better than chasing sticks which is the only thing he will chase at the moment. He will never fetch it though. I'd tried treats as he is food motivated but as soon as he realises there are treats involved, he won't leave my side.
But tonight, he decided he wanted to play with his tennis ball so he plonked it down on my lap. I threw it across the room, he bounced along to get it and returned it to me. Again, he plonked it on my lap so I continued with the game and he got the ball for me each time. He loved and I am so happy he seems to know what to do.
I can guarantee that when we take the ball to the park with us, he will let me throw it and then look at me as if to tell me to fetch it! But, its a start 