We give our 3 Chudleys
http://www.chudleys.com/working-dog/products/working-dog/working-crunch.html
Available at pets at Home Jolleys even Amazon.
Reasonably priced and good ingredients.
In truth it's down to what your dog likes the taste of.
Some dogs are happy on the very best TOTW etc, others will only eat Wagg.
We have tried the Excellent and High quality, high priced Kibbles (£50+ per bag) and the dogs liked it for a few weeks.
Then gradually went off it. (actively picking it out of the bowl and eating the rest)
Also tried the cheapest crap on the market which they wolfed down :eek:
However we discovered it changed Echo's coat colour. So that was stopped.
Now we have them on Chudleys which they also wolf down, but is reasonably priced and decent ingredients.