Hmmm, that's the approach I've taken, and the vet's attitude is that I've been warned but the birds are happy, so no issue. It'd be nice if Kiki was friendlier to my wife, but I think there is a situation of an immovable object v an irresistable force. I've had bigger birds (galahs) when I was younger, and I'd have to say the lovies make up in determination (and nipping power) what they lack in size.