> Anyone know of guesstimates of when animal husbandry began?
 
I have read (no, I can't provide exact references for this - I don't remember the researcher's name) estimates of 10,000-25,000 years prior to the advent of agriculture. Which leaves us with a range of 20,000-35,000 years ago? (Based on the premise that Natufians were farming about 10-11,000 years ago).