In-Vivo Methods of Digestibility Estimation

Correct Answer: Both Nylon/Dacron bag technique and VIVAR technique

Both are in-vivo methods performed inside a living animal:

• Nylon/Dacron bag (In-sacco): Feed in porous nylon bags placed in rumen via cannula. Measures rate and extent of rumen degradation.
• VIVAR (In-Vivo Artificial Rumen Technology): Artificial rumen system implanted in the living animal.

Collection Periods

• Adjustment: 10–12 days (ruminant); 7–10 days (horse, swine)
• Collection: 7–10 days for all species