Urgent help needed!

My mom was digging in the garden. Her shovel went into the ground with a CRUNCH! Then she saw something oozing out of the side of the hole. She finished uncovering the item. It was an egg! She came in and asked if any birds laid eggs in the ground. I said “not that I know of.” It’s too big to be a snake or turtle egg and also not round enough to be a turtle egg. WAY to big to be a salamander egg or anything like that. I’m pretty sure it is a Wild Turkey egg, but the only logical explanation of how it got there is that a fox, coyote, Coywolf, raccoon or something like that stole the egg from a turkey nest and buried it in the soft garden dirt so that other animals wouldn’t find it. Before I start digging gently with my hands, risking touching raw egg insides, do you think there are more, and if so, is there any possible way we can save them?