I find a bet that has over $100,000, and then click on the highest percentage rat and look at his statistics. If it shows he won the last battle (ratfight or betted duel), then I might place a bet if the percentage is around 95% of the bets.
Then I check the loser and see if he got beat the the person challenging him. If it indeed shows it, then I may place a bet.
The ones that say that the higher percentage rat won both a ratattack and a rat duel against the person they are dueling against, then I will bet more money on it as it may be a sure bet of me winning.
But still there is a chance you can lose
Using that information, I did this in my last 3 bets and won
7/17 01:00.00 PM You gained $2161 from your bet [$2000] in Fight 16862 [d]
7/17 01:00.00 PM You gained $1094 from your bet [$1000] in Fight 16863 [d]
7/17 01:00.00 PM You gained $2126 from your bet [$2000] in Fight 16864
Notice I only bet a little as I am still paranoid about losing money. so I only bet a little. Once I get more confident I will bet more