I have always used the puppy food or the prestige for Mum and pups and pups have done great on both.

I have used the Prestige if the bitch was a bit picky in whelp, as it semed to be even more palatable than the puppy.

I have fed arden grange  to my collies for about thirteen years and have always been happy with it.Icould feed cheaper,as im not very well off but i think itd be a false economy.Ive never fed burns or orijen so i cant comment,but i would reccomend arden grange.