I want to get two pekin ducks but i have a river in my backyard is this ok?

If you are worried about hunters, don't take the risk. the largest, deepest kiddie pool you can find will work beautifully. just be sure to change and sterilize or circulate the water in it. Still water, when left too long, will attract mosquitoes, especially on the east coast. i used to live in michigan. When you fill the pool with water, NEVER use tap water. it contains chlorine and other toxins that we do not find harmful, but will wreak havoc on a duck's system. Water from the river will work fine, as it is what the duck is probably used to. and on the topic of showing them, many people have purchased dogs from kennels and won, so getting them from a hatchery shouldn't matter.