Value betting several runners in a race.

[Tiger]

I have been working on what I'm happy to call true value for the greyhound races at various tracks and traps.

If I'm confident that I have found value odds for both traps 1, & 6 for examples should I put bets on both dogs or pick just one?

What happens if I found value odds for 3 or 4 more of the 6 dogs?

Do I not erode my value or profits by placing multiple single bets on a one winner event?

I usually place bets with a target profit rather than a fixed stake. Is this still the right approach for multiple back bets in the win market event?