Hi, I have two 7 month old mixed breed puppies. We be believe they are a Border Collie/Lab mix. Currently 52 and 46 lbs. We anticipated large dogs so we have been feeding them large breed puppy since birth. My question is, should I continue large breed puppy and which food do you suggest? They started with Nutro, then Blue Buffalo and currently Wellness dry/wet mix. Considering Orijen.