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Original Description:
 
Vitality Gems are a magical marvel that have revolutionized medicine in Equestria. Their enchantment can keep a living being alive and healthy, without need of nourishment or water, without aches or atrophy… with the only caveat that the patient cannot move more than a few little wiggles. A perfect application for coma patients or those in full body casts…
 
But a few innovative and creative individuals have found other long term uses for them.
 
As Gilda here is perfectly demonstrating in this bird cage which is just a few sizes too small~