weve got a week until our own mares go thought theyre technically "safe" any time now and our maiden is very jiggly and loose in the ass im just praying ours go good last year was almost 20k in vet bills
im only home because they opted to euthanize her, i offered to bottle feed her over night to see if she would pick up over night but they werent willing to pay even my reduced rate and opted to put her down instead
i would guess spinal cord underdevelopment, SC injury, SC pinch, something wrong with the hips/pelvis, brain underdevelopment, or maybe something worse god forbid.
i think stay T2 for now. your pieces are quite inconsistent, ranging from low to high T2 and low T1 quality with every iece. perfect your technique and get it consistent before moving up.