What do you do about a dog who wants variety in her diet?

I have an Australian Cattle Dog who is 8 months old. The breeder was feeding her Puppy Chow, but I thought I'd start her on Blue Buffalo and I changed her diet. She started to love it after I had transitioned her to the new diet. Then, all of a sudden, she was turning her nose up to the food. I started enhancing her food with some treats mixed in & she started eating it again. Then, she wouldn't eat it. Transitioned her to the canned which she loved - for a while. Recently, I started her on Innova canned which she loved at first and is now turning up her nose to it. I feed her once in the morning and once around 4 PM. Being just 8 months old, and high energy, she needs her nutrition. What do I do about a dog like this?

Dogs normally want to eat when they're hungry. I would just put your choice of food down and let her eat what you put there when she wants. She'll adapt. If she shows signs of losing weight or her coat is getting dull and brittle then take her to the vet to see what might be the problem. Watch her stool for any indication of worms.