The Vaseline is a good aid in their digestion.
As for the dosing, I'm with BJ - conservative is usually best. And keep in mind, if they do go low (whether we see it or not), those reds may just be bounces. It's usually best to hold the dose and let them level out. This sometimes takes a few cycles, but will help them acclimate to the dose you're holding. Then hopefully, the lows and highs balance out and you get the curve right where it needs to be.