I actually have a negative report, but it could have been a fault of mine. On February 5th, I treated all of my birds with Frontline, putting a drop directly on the skin at the base of the neck, one at the base of the tail, and one around the vent area. After rereading John's post again, I realized he said 4 drops for LF. My rooster Thor had them pretty bad so I actually DID give him 4 drops the first time.
I was looking him over a couple of days ago (3 weeks after treatment) and found he had a lot of little red mites on his right shoulder again. An even larger area than before. We retreated again, this time making sure everyone got 4 drops directly on the skin and Thor and a couple of my larger birds got 5 drops. We also made sure to gently shake the bottle around before putting it into the eye dropper, just in case I didn't have it mixed up well enough the first time. I just now checked for an expiration date and can't find one, but it was a brand new bottle that I had just ordered so that shouldn't be an issue.
Any ideas?