The 10x iron content mentioned was in the forage tested from Hondo's pasture which turns out to be about the same as the average hay found in Arizona. Iron in the water does not seem high. The water is generally hard in Arizona (high mineral content) but no red deposits. I also read somewhere (on the net) that the chemical form of iron in water was not metabolized as the iron found in plants. Take that with a grain of salt until verified as I have no recollection where I read it.
The mixer being used is Purina SafeChoice Special Care. At present 8 cups are mixed to one cup of Arizona Copper Complete and will hopefully be able to be reduced even more. At some point some calculations will need to be done to be sure none of the minerals are being over done. The amounts are small in SafeChoice so hopefully there won't be a problem. Guaranteed analysis below.
His heel bulbs were not up to having the Viper boots left on last night. The heel portion was too tight. They were loosened but not soon enough. Today the clog adaptations will be transferred to some oversized easycare gloves which should allow his bulbs to recover. But push come to shove, better for his bulbs to be temporarily damaged rather than his coffin bone permanently.
Confession time. I've been negligent about weighing his feed on the assumption my eye had been properly calibrated. Well, the calibration gradually went off over time and needed adjustment. There is now a 25 gallon container permanently hanging in the haybarn attached to a scale. He's been being fed way way over 2%.
This sentence caught my eye in one article: "Low blood glucose causes horses to eat more and faster. In ponies, blood glucose influences the interval between feeding but not the amount. Adding oil to the feed produces low, steady blood glucose levels, extends the interval between feeding and reduces total intake for three to 18 hours after consumption." Hoofbeats Magazine - What Controls Appetite in the Horse?
Further reading on other sites produced confusing and confounding information about controlling hunger with oil.
This ordeal is becoming another huge rabbit hole to wonder around in.
SafeChoice Special Care guaranteed analysis:
Crude Protein, minimum 14.0%
Lysine, minimum 0.80%
Methionine, minimum 0.30%
Threonine, minimum 0.50%
Crude Fat, minimum 7.0%
Crude Fiber, maximum 15.0%
ADF, maximum 19.0%
NDF, maximum 39.0%
Dietary Starch*, maximum 11.0%
Sugar*, maximum 4.0%
Calcium, minimum 0.90%
Calcium, maximum 1.20%
Phosphorus, minimum 0.70%
Copper, minimum 50 ppm
Zinc, minimum 160 ppm
Selenium, minimum 0.60 ppm
Vitamin A, minimum 3,000 IU/lb
Vitamin D, minimum 350 IU/lb
Vitamin E, minimum 100 IU/lb
Biotin, minimum 0.45 mg/lb
Lactobacillus acidophilus, minimum 5.1 MIL CFU/LB
Lactobacillus casei, minimum 5.1 MIL CFU/LB
Bifidobacterium thermophilum, minimum 5.1 MIL CFU/LB
Enterococcus Faecium, minimum 5.1 MIL CFU/LB
*NSC (Non-structural Carbohydrates) = Dietary Starch + Sugar