If Asda's Smartprice food came out as the best quality then I dread to think what they were comparing it to
I've just Googled it and it contains 'Cereals, Meat and Animal Derivatives, Oils & Fats, Minerals, Derivatives of Vegetable Origin' so the main ingredient is unspecified cereals followed by an unspecified quantity of unspecified meat and derivatives so you've no idea what's actually in it. I would guess it's more derivatives than meat and even then not much of that, because again they don't specify, it could be 99% 'cereals' and 1% 'meat and derivatives'. I didn't see the programme so don't know on what basis they were comparing it or what to. Maybe compared to other very poor quality foods it might be the 'best' but it would be a very relative judgement
Regarding my lot Tilly is on Skinner's Field&Trial duck and rice kibble as she has inflammatory bowel disease and it's the only food she can tolerate. Rodaidh and Caoimhe are on half raw and half kibble - either Barking Heads salmon and potato or the same Skinner's as Tilly in the 'off' season and Skinner's working dog kibble in the working season.