I was thinking of going with a shave, since she did drop so sharply between +2 and +4. Usually, she pretty much surfs after +2, so this particular drop did catch my eye. If the shave fails, we'll take her right back up.
I did know that in general, now that she's at 1 year and 1 day, she needs to drop below 40 for a reducie. That's definitely a nail-biter for me...she's never dropped below 40 before - or, at least we've never allowed it! I feel like we're entering a new ball game since we've hit the one year mark.