Purse money is so good now that I don't see much betting. Sure, an owner can bet his horse if he thinks he can win. But it's not like the old days. Plus, the pools are much smaller now, and bets all show up. People talk about betting offshore, but they are not in business to give away money.
Then of course you have the owners or trainers that say they bet thier horse good when it wins and made a ton of money. Most are full of shit. Covering up on a horse they overpaid for, which is way underperforming