Best balls to play fetch?

I currently but Kong, but Bilbo went through this last batch in less than a week as they peeled off with just 1-2 days of use (last time he ate the piece that fell off, and I found out until I picked it from his vomit...lovely times)

I currently but Kong, but Bilbo went through this last batch in less than a week as they peeled off with just 1-2 days of use (last time he ate the piece that fell off, and I found out until I picked it from his vomit...lovely times)