Have any animals ever been tested?

As noted above, Therapeutic Hypothermia and Total Parenteral Nutrition are medical procedures that are used in every major medical center in the United States. They have been well studied in both animal and human investigative trials. Current human studies have shown the safety and medical benefit of Torpor for as long as 14 days straight and as many as 5 repeat cycles. Prolonged Therapeutic Hypothermia resulting in Torpor greater than that has not been studied at this point and would need to be investigated further.