If my two front tires are losing tread faster then my rear tires is it a good idea to have them rotated?
My truck is rear wheel drive
Yes, and don't corner so fast. Brake sooner, release the brake and then turn the wheel.The idea is not to brake and turn at the same time.
Yes. And when the other ones start to loose tread rotate those, because waiting is the quickest way to cause a blow out.
Generally it's recommended that tires be rotated every 6000 miles or so, to help extend tread life.
Sounds like you need to check your tire pressure or have your front aligned. But you should have your tires rotated at every 5,000 miles.