Abstract
1. 1. Digestibilities of feed, and transit and retention time of fluid and particle digesta marker measured in nutrias ( Myocaster coypus) and guinea-pigs ( Cavia porcellus) fed on a diet containing 50% alfalfa. 2. 2. The digestibility of fibre was higher in the nutria, along with the longer retention time of digesta. 3. 3. The liquid and particle marker were similarly excreted, suggesting no separation mechanism in the gastrointestinal tract of both the animals. 4. 4. The apparent digestibility of protein in the nutria was superior to the guinea-pig and other small hindgut fermenters, suggesting that the contribution of coprophagy on protein nutrition of nutrias is significant.
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