WOW!!! I have just found this thread I started over a year and 1/2 ago!!!!! Just in case anyone digs this out of the archives looking for a cure stick-tight fleas, I wanted to let everyone know that the long term treatment of Sevin has been PERFECT. After that treatment back in Jan/Feb 2011 we have not had one more incident with stick-tight fleas and have never had to re-treat the birds. Just in case anyone else has this problem - a thorough 'dousing' of the birds and the coop will completely eraedicate these pesky little blighters.
As a side note these RIR's are still going strong (looking a bit scraggly at the mo coz they're molting) but we did not loose one bird. Amazing hey?!!