Hi,
no particlular word describing the state of diccoordination of a fawn comes to my mind. However the word 'chel-lay' sounds in my ears like 'cielę'. Cielę is a general worls for newborn cattle, deer , fallow deer etc.
There's a popular idiom 'być jak cielę' (to be like a fawn' which geberally depicts foolish or UNCOORDINATED behaviour, though. Perhaps this is what you've heard: 'the fawn is like a cielę'
Hope this helps a bit
All the best and regards from Warsaw, Poland.