That's why I wanted to keep to the food she's used to.When looking at foods there are three considerations.
1/ Quality. (the reason is obvious.)
2/ Availability. (There is no point in selecting a food which is difficult to obtain where you are.)
3/ Price. (Sadly we ae not all millionaires, so price does have to come into the equation for many people.)
Arden Grange is a reasonable quality food and I would certainly recommend you using it, at least initially. When you first get a puppy there are so many changes in the pup's life, different people, different home, so much stress. At least by keeping the same food the breeder was using you are helping to minimise that stress, something the pup knows.