I never said lean Casso, i said fit. It was in reply to people saying they liked extra weight on their dogs for work
A dog with extra weight at the beginning will still be in the same position 3/4 weeks into the season as a dog starting out fit, except it will have had a greater chance of injury during that time.
I don't go out 4 times per week day and night for 30 rabbits each time, i have no need to. I do however go out 5 + nights per week, for lesser numbers and other prey then usually 1 night per week for up to 30 rabbits, with a bit of daytime bushing here and there. Then the lurchers