Winning Edge Platinum, a 20kg dry dog food and the higher specification of the two formulas in the range. Aimed at working and highly active dogs.
If your dogs are in steady rather than heavy work, Gold is the more sensible starting point. Compare the guaranteed analysis on both listings and match it to the workload in front of you, not the season you are hoping for.
Introduce any new food over 7-10 days.
Freight note: 20kg bags are heavy freight.