Our golden retriever pup is on eukanuba large breed puppie complete dry food were are just looking to change the brand of food as there is no local supplier in our area. What would be the next best thing to pup our puppie on?

Eukanuba is a popular food which is available online and most companies do not charge delivery costs if you buy 2 or more bags, or spend over a particular amount.  Try someone like VetUK - they currently have it on special offer.  20% off til Oct 10th and free delivery

I like fish4dogs or Arden Grange but there are lots of choices and what suits one dog may well not suit another so it's advisable to keep puppies on the breeder recommended food (at least for a couple of sacks) and then make the change gradually if you feel it's absolutely necessary.  Luckily your breeder has chosen one of the most easily obtainable brands