It looks like this ability *was* there, but was taken out at some point.

Because of security features in modern editions of Windows, installations are split between the C drive and the Documents folder, and some file types go in each particular location when installing addons.

The most comprehensive way of getting more eggs and norns in Creatures Village is to install the CV Population Update, which gives four eggs at startup and allows you to keep 8 norns, and changes the genetics of the creatures to improve their memory.

If you'd just rather recover the three eggs ability, download this file that I just made and put it in your C drive > GOG Games > Creatures Village > Bootstrap > 001 Main folder - it will replace a file in there, restoring the 3 eggs ability. If you like, you can open it with notepad and compare it with the file that you already have - I removed some asterisks which are used to comment out code.

To see the results, start a fresh world.