What is the ruling if a pig falls into a small well and is extracted alive without its mouth touching the water?

Well Purification: Animal Falls and Complete Drainage Rules

• The well remains completely pure because the pig exited alive.
• The well must be completely drained because the pig is inherently impure (Najis al-'Ayn).
• Draining only 20 buckets is sufficient.
• Only the edge of the well must be wiped.