Doggy food question. ?

What is a good diet for an Australian shepherd?? Planning on adopting one soon. It will be a puppy, very active, fixed, in a calm/not calm environment and everything. If you need I'll put more details as answers for questions you have. I'm most worried about giving the dog a nice diet to keep him happy and healthy inthe long run. Veggies and crunchy food. Maybe wet food. Anything really to meet the Aussie requirements. Thankss. Also I don't wanna have to pay an arm and a leg too much. I also don't wanna pay so little I may as well be feeding them trash, but I have 2 cats that I have to pay for too. Anyway thanks for reading.