So you had a broody sitting on eggs while you were away.... that’s different. If you read the OPs original post he says the eggs were given to him from a farm.
An egg has to be purposefully incubated. It doesn’t just develop from sitting around unattended... why would she collect a 3 week old egg out of the coop and give it to you? This makes absolutely no sense.
This makes no sense. There are 4 possibilities here:
1. Your riding instructor is a complete
dope who didn’t realize he had a
broody and took 3 week old eggs that had never left the coop and gave them to you (which also indicates he doesn’t care about the quality or age of the eggs...