It sounds to me that this teacher is a bit of a "Flake". What is she doing teaching 3 to 4 year olds ? What kind of message is this sending to the kids ?
I would take the decision from her. Maybe start up your own batch and tell her that you would be happy to have the kids visit as part of her educational program on baby animals/chickens and maybe let them candle some eggs later then visit when they pip, and then as "Day olds" in the brooder etc. imho she was being ambitious expecting kids that young to do much more anyway. AND very inconsiderate to you and the kids. (Despite her obvious good intention)
JMHO
I would take the decision from her. Maybe start up your own batch and tell her that you would be happy to have the kids visit as part of her educational program on baby animals/chickens and maybe let them candle some eggs later then visit when they pip, and then as "Day olds" in the brooder etc. imho she was being ambitious expecting kids that young to do much more anyway. AND very inconsiderate to you and the kids. (Despite her obvious good intention)
JMHO