Thats weird, my suet turns green in about 3 days,Is the meat on your suet from kidneys  Craig?
My suet comes with traces of kidney on it. No actual muscle meat.
I freeze most of my suet straight away because of this.
Muscle meat left in my fridge will last 7+ days.

High meat by Aajonus:

"Place 1 volume pint of raw meat, chopped into bite sized pieces, into a glass quart jar: equal air and meat space. Place Ball jar lid on jar tightly and place in refrigerator. I suggest three jars be prepared; one with raw meat, one with natural raw fowl and one with ocean wild caught raw fish. Every 3-4 days take the jar outdoors, completely remove lids and wave the jars in the air to exchange the air inside the jars. Return lids to jars, tighten and return to refrigeration. After 4 weeks, you may begin to eat one marble sized piece once or twice every week. There are approximately 17 stages of bacterial developments. Airing the meat is required to progress the bacteria through the stages....."

I would only add ENJOY!

Yuri

I've tried using frozen meat as a starter for high-meat and it just didn't seem to work.

I can't remember exactly. This was years ago, when I first started to experiment with high-meat. It just didn't seem to provide the same benefits re boosted concentration/energy-levels etc. as "normal" high-meat. Try it, anyway, if you feel like it.