I have looked everywhere for a link to this article, and what I find so far...is that is doesn't exist.
If anyone can find a link, I would love to have it, please.
That said...I whole-heartedly agree with it, no matter who wrote it...blanketing is far over-done, and under-done at the same time. Over-done in that horses are being blanketed that don't need to be, and under-done in that they are blanketed with blankets far-far too light to make up for the loss in natural coat loft ability.
I have also not been able to find this study via the internet. There are several forums that have picked this up and discussed it with the same conclusion...
the study does not exist.
It appears that someone has used Colorado State University's name on something they wrote to give it credibility. The internet can be dangerous at times.
There are valid reasons for blanketing a horse and some of those have been given here: clipped horses, horses traveling to a show after being clipped, thin horses that are unable to maintain their body heat on their own for lack of body condition, horses with no shelter to get out of the weather (shame on the owners), horses that are compromised by disease or colic etc that may need extra help.
It gets back to USE COMMON SENSE when deciding on blankets. If providing shelter by bringing them into the barn warms them up, then do it. Shivering is the body's way of letting us know it is not able to regulate body heat without shivering.
Here is a definition on shivering:
"Shivering (also called
shuddering) is a bodily function in response to early hypothermia in warm-blooded animals. When the core body temperature drops, the shivering reflex is triggered to maintain homeostasis. Muscle groups around the vital organs begin to shake in small movements in an attempt to create warmth by expending energy. Shivering can also be a response to a fever, as a person may feel cold, though their core temperature is already elevated.
Located in the posterior hypothalamus near the wall of the third ventricle is an area called the primary motor centre for shivering. This area is normally inhibited by signals from the heat centre in the anterior hypothalamic-preoptic area but is excited by cold signals from the skin and spinal cord. Therefore, this centre becomes activated when the body temperature falls even a fraction of a degree below a critical temperature level.
Increased muscular activity results in the generation of heat as a byproduct. Most often, when the purpose of the muscle activity is to produce motion, the heat is wasted energy. In shivering, the heat is the main intended product and is utilized for warmth. "
Here is an article I have just received from Purina on winter care of horses:
Purina Winter Feeding