Hello : ) (and help)

Hello fellow dog lovers.
We have 1 dog (border collie) and 1 bitch (collie x), unrelated, but obtained at the same time when they were 3 months old. They are now approx 4yrs old.
Dog has major complex, mainly around food and seems to be dominated by the bitch in general. We have tried everything thinking it was behavioural or pack type issue. We have now tried changing his food and he eats much better.
The food he now eats is Bakers meaty meals which is quite dear and only in 3kg bags.
Does anyone know of a similar 'soft' complete biscuit in bigger bags? We've searched high and low so far.
Cheers : )

Bob