[acheo]

I feed my 65 lbs golden retreiver with Hill's Canine g/d dry. My dog is healthy and has no health condition. He will be turning 4 soon.

1. Eventhough he has no condition would you recommend that type of food for him? Please explain.

2. This food is made of oil of fish. Eating fish twice a day is not recommended for us because of the mercury. Wouldn't it be the same for dogs?

3. For a healthy dog would'n't it be better to switch food everyday? ex: switch everyday between Iam's dry (large breed) and Hill's Canine g/d.

Thanks