Before we bought some fertilized eggs, we tried some that were in our fridge, for fun. One in five hatched (one other piped, but was sideways).
Motzy here is a family pet, with some cage mates in the incubator.
Be careful working with construction sand. It’s a safety hazard for humans (and birds). It has silica dust, which is why it’s usually only used to build. Play sand is dust free, and safe to work with.
Here’s the material safety data sheet for construction sand. Pretty nasty stuff. I always use...