As we all know, knowledge is key to making a profit. In the last week I have lost 3 bets due to not knowing that a horse was recently gelded.
Only finding the information out from the commentator. "The recent gelding operation has done the trick" was heard more than once. Their is no site that I know off that will show either date of gelding or state recently gelded.
Occasionally I will see something in the paper but not often.