They are tiny white worms. I've seen where the bread has been soaked in milk for them, but not yogurt. A lot of people just do water, milk tends to sour the bread fast.
Rcv'd my culture today! They were packaged exceptionally well and got them really fast! Debbi provided instructions about the care of the culture and so I was very prepared when they arrived. She is a very knowledgable and trustworthy person and I highly recommend her!!! I would have been lost without her assistance.