Genesis isn't one i had heard of but i looked on their website. It seems to me a quality dry complete if the price is anything to go by. For a maintenance diet protein level is a little high... but as a comparison ProPlan [who claim to have spent £Ms on research] are closer to 30% protein.

There are now so many makes available and it is bewildering to know what to feed - i'd say stick to one of the well known ones. Visit the factory and hear what they say. I live about 7 miles from Spillers so i would be feeding that - but i'm not feeding dry complete at present.

Price isn't necessarily a good guide. Spillers have their own factory which reduces their costs. Some makes use a process factory and thus pass on a higher cost.

If you change do a lot of research beforehand as it's unwise to keep changing their food. I don't know much about Collies and nil about their digestion and metabolism. I would think due to their working origin that they are a low rate of metabolism and thus a lower protein would be more appropriate. My Saluki-Collie seems to have a faster rate of metabolism that expected and so i feed her more.