Funny enough, a few days after I post the ball drive thread and saying that I love it...this happens. For the 3rd time. I don't love it today! Nia is always sooooo into playing ball, we were playing on grass but also on concrete, it was connected. We play for about 30 min and then I notice Nia is leaving little bloody foot prints on the concrete!!! 3 of her 4 feet (nails) were bleeding! Here's an example of one... I forgot I dremeled her nails 2 days ago and by playing on the concrete, it became way too short!! She just kept playing and playing though and it was bleeding a lot!! God. Why can't she tell me or stop!!!!! Poor dog Stupid stupid ball drive. Stupid obsessive dog.