Just looking for some advice, when do you switch from puppy to adult food??

I am planning on doing it at a year old. ..gradually...

On the advice of both my breeder and my vet, I switched Kodi to adult food around one year. As Evelyn said, make sure you do it gradually.

You don't have to buy "puppy" food though. Sabine talks about the puppy food myth. here.....
"Dogs need a food product appropriate for their life stage This is what pet food manufacturers want you to believe, but it is just a way to secure their customer base early on and increase sales. The more items in a particular line of food, the higher the visibility of their product on a store shelf - an of course the more likely people are to buy and stick with the brand through the whole life of the animal. Fact is that a food declared as suitable "for all lifestages" will feed a growing puppy just as well as a lactating bitch, an adult or a senior dog - just the amounts you have to feed will change. Puppy and senior food is often more expensive than the regular type of food of the same brand, yet does not differ much in nutritional value. Compare the guaranteed analysis and ingredient list."
Rule no. 1 ,don't ask a vet about food. Rule no. 2 dont' believe half of what these dog food companies tell us.

Rule no.3 If the food brand is sold at Walmart, avoid it.

right. And I'm not sure in U.S. but in Canada you cant get a descent food in any big box store ,only the small specialty stores. Not even Petsmart.

Petsmart in my area carries a good selection of quality natural foods. That's where I get Ruffles' food... C&P Ultramix.