Milk Kefir Grains...Might try milk kefir in another attempt for a pizza like Jim Lahey's

This is a picture of how my milk kefir grains look after they are drained from the milk kefir.  I did fed them milk after I took this picture.  It might be a possibility to try milk kefir to leaven a dough for another attempt for a pizza like I ate at Sullivan St. Bakery.

Norma