This research responds to a new strategy of foods nutritionally modified to improve the bioavailability and quantity of nutrients in the egg. Fortification with iron is one of the most common and the sources that exist to obtain it are varied. Carao (Cassia grandis) is such one of them due to its content of inorganic iron and possible use in the fortification of egg products. In Honduras there are no validated studies on the fortification of powdered egg with iron coming from carao (C. grandis), and its incidence as a potential alternative to treat iron-deficiency anemia. For its achievement, an objective was set out to evaluate the phenotypic, physicochemical and sensory characteristics of carao (C. grandis) to determine its fortifying capacity in powdered egg. Fresh eggs from the poultry farm of the National University of Agriculture and carao (C. grandis) from the department of Choluteca, Honduras were used as raw material. It was determined that the phenotypic characterizations of the carao fruit (C. grandis) were distributed in 11.81% seeds, 9.45% pulp and 78.74% bark. It has a length of 55 cm, a width of 36 mm, a thickness of 30 mm, contains 80 locules and 60 seeds, and the fruit has a mass of 254 g. Fresh carao pulp contains 72% soluble solids, a pH of 5.51 and a viscosity of 200.66 cP. The same, when subjected to dehydration increases 13% of soluble solids, however, its pH-maintains stability.

Corn distiller dried grains (corn-DDG) addition to pig diets has been limited due to fiber concerns. The purposes were to determine the metabolizable energy of corn-DDG (Exp. I) and the dose–response effects of dietary xylanase plus β-glucanase on nutrient and energy digestibility of growing pigs fed diets containing 25% corn-DDG (Exp. II). Pigs in individual cages were submitted to feeding periods of 5 d for voluntary feed intake quantification followed by 5 d for collection of feces and urine. In Exp. I, 10 barrows with 61.10 ± 3.25 kg BW distributed in a randomized complete block design experiment with five replications were fed a reference diet or a test diet (75% reference diet plus 25% corn-DDG). In Exp. II, 10 castrated male pigs with 29.69 ± 3.57 kg BW distributed in a Latin square design (two squares with four replicates in time) experiment were fed with 5 dietary xylanase plus β-glucanase levels (0, 50, 100, 200 or 400 mg/kg) added to diets formulated with 25% corn-DDG. The corn-DDG had 26.5% crude protein, 5.94% ether extract, 55.5% neutral detergent fiber (NDF) and 4,248 kcal/kg gross energy. The metabolizable energy of corn-DDG was 3,657 ± 189 kcal/kg. Increasing dietary xylanase plus β-glucanase quadratically influenced (P < 0.05) the NDF digestibility and digestible energy in growing pigs fed diets containing 25% corn-DDGS. Compared to the control, dietary xylanase plus β-glucanase addition increased digestibility and reduced metabolizability of crude protein. Dietary xylanase plus β-glucanase addition in growing pig diets containing corn-DDG increased NDF digestibility, allowing additional dietary energy and protein availability.