Is it true that you have to actually step on a copperhead to provoke them to bite?
Nope this is a wives tale. Urging her husband on to pick it up....
I once had a long war with Copperheads. Find my thread on it. Our farm had a 200 plus foot bluff one one end next to a river. Copperheads had a den in a cave on the bluff. Every spring our farm was overrun with Copper heads. Claiming statute of limitations I personally caused the demise of many Copperheads. I've seen them strike at a dog and hog only because they got too close.
My dog was like a mongoose, he kept feinting until the snake struck, he would bite the snake when it was stretched out throw it and was on it in a flash shaking it until it was over. The hog had sniffed the snake out or perhaps we threw it to the hog, anyway the hog ate it.
While running to the school bus one morning my sister stepped on a very large Copperhead who struck at her but she was of him and gone when he struck where her leg was. I saw this and jumped over the snake, I hit hit with a thrown world history book. Broke his back. The snakes disappeared after dad started raising hogs who find snakes a tasty little tidbit.
Snakes are also very short tempered when shedding their skin. Very, very short tempered. This is experience talking.
Trusting any pit viper could be a strike against you.
For the original OP. A dog that likes to investigate and patrol the yard is good. Teaching the son to not pick up snakes is also a healthy thing to do.
When I was about 5, Dad parked the car and walking around to Moms side he saw and stomped on a grown Copperheads head. Dad was wearing boots.
I observed this and a day or so later Dad saw me stomping on something with my low cut tennis shoes, it hit him I saw him stomp a snake. He ran over and jerked me straight up, I do remember this because of the butt stomping Mom gave me a few seconds later. I was stomping a whole bunch of baby Copperheads...... I received lectures for a while to reinforce the subject. I respect all that lives, but I respect dead vipers around the house.