Marlah, whether a dog is neutered or not does not affect its ability to handle a certain diet. And it made your dog's urine strong because since it is a dry food with high protein levels, it requires a lot of moisture to be added to it in order to be handled properly by the body. That's why many people add a high-quality wet food to a high-protein kibble.
Their price is high, yes, but since it is such a nutrient-dense food (it has more calories/lb than many other brands) you don't have to feed much of it. So, one doesn't really go through that much of the food compared to other brands.
The incident in Australia was NOT caused by the food or ingredients. It was the result of irradiation, a process the Australian Government (and ONLY Australia) uses on foods. The irradiation process broke down the vitamins in the food - specifically, the amount of Vitamin A was decreased by 75%. Again, Australia is the only place in the world were the food was irradiated!
I know some people were upset by Australia's mandate of irradiating the food. But the irradiating was Australia's policy, not Orijen's. And, since Orijen couldn't convince them that it IS adequately cooked, they pulled out of the market entirely - rather loose the business, than put the animals in danger.

to add to what Faustao said, dogs are CARNIVORES. You would be hard pressed to find a food that is "too high in protein" for a carnivore.