32% protein too much for 1 and 2 yr old dogs?

Is there a recommended protein amount?

I am currently feeding Taste of the Wild Wetlands dry to my two Tibetan Terriers who are just one and almost 2 and weigh about 22# each.

I ask this because I read that more protein can make the white spots on the grass worse and our house is on the market or I wouldn't care about the grass.

That got me thinking about how much protein my dogs really need. They are moderately active, chasing each other around but don't go for long runs, just easy walks.

Would a lower protein food be better or isn't it a concern?

Thanks