Wow they are short. Whats he house on? Any rocks or stones in there will grind them down. Doubt you have anything you need to worry about haha. He might just slip when climbing. maybe just take out some of the rough things and they should grow back
His on play sand. yeah there's a rock under the heat lamp he does it on I'll probably just leave it how it is if his still happy. His almost a year old got him from cammo at the penrith expo might get some more this season.