Doug Dix is an awesome guy. I personally love him. He is very smart, has some very healthy critters, and is fantastic to deal with and will answer any question you may have. Grats on your new bluey!
I just think of the warming up period as morning and night rises and drops. It happens in nature, so I wouldnt worry about it. The "waiting" period is totally up to interpretation, and is always different for every animal and species.
Collard greens are fine, but I believe they might be an "occasional" green. I use Mustard greens as my staple green, but I did use to use collards. Now I have to go re-read the food chart...
