This exact container has been used on a few other threads with reports that it breathes well.Good for you for getting it started before the chicks arrive! You'll get the ratio of food to water figured out so it is exactly the consistency you want after everything ferments.
It looks pretty sitting there in that glass jar. I know that lid doesn't create an airtight seal, but you sill might want to stick a spoon under one side of the lid so it can burp/breathe.
However, that being said, the lid is such that it can easily be positioned not exactly on center, leaving a small gap around the edge. I did that this morning before I left for work not wanting to be the 1% that had a problem!
