I've co-owned a few racing greyhounds in my time, great fun and a cheap hobby for a collection of mates. That said, in all the times I've had a runner, there was only one occasion when I really felt that our dog would win; she'd had a shocker in a high class race, been dropped well down and the trainer had discovered a sore paw after the event, all fixed for the next run, we got 9/2 and she flew home.
As for advice, it's impossible to discount luck as a major factor, but there are a couple of things I can suggest
1) traps 3&4 have the best strike rate at Belle Vie but this changes to 5&6 in very wet weather. The theory is that the banked course means the outside stays dryer and the dogs can get better grip.
2) the race cards are a wealth of information. Look at the classification of the race, almost always 'A' followed by a number. The lower the number the better the grade, with 'OR' for open race being the highest standard, then A1, A2 etc. If the next race is A6, see of any of the field raced in A5 or A7 last time. A5 is an indication that they might be better than this race, whereas an A7 winner could be on the upgrade.
3) look for a dog that had trouble in running, again the card can help here, if you find one that won a couple of races on the spin having been slowly away but stayed on, only to been bumped/interfered last time out, then it may have just been bad luck that prevented a win.
4) the advice about doing a set forecast/tricast is sound. Easy to put on before racing, if it comes in once you'll usually cover your outlay, twice or more and you're picking up a tidy sum.
For what it's worth, I tend to look for fast starters from 2&3 on the upgrade, and hope they blitz out and make all. But I can't stress enough that it's only a laugh and not something for serious money unless you know something others don't.
