Assessing the viability of noodle waste as a substitute for maize grains in dog feed: In vitro digestibility and palatability studies
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The aim of this study was to evaluate the potential of noodle waste as a substitute for maize grains in dog feed through in vitro digestibility analysis and palatability testing. The study was conducted in two parts: processing and blending noodle waste, and a palatability trial. In the first phase, noodle waste was processed and blended with other ingredients to create diets replacing maize at increasing inclusion levels. In vitro digestibility was assessed with gastric and intestinal phases employing pepsin‑HCl and pancreatin solutions. In the second part, a palatability trial was conducted with Labrador dogs using a two‑plate test. Dogs were given control and noodle waste‑based diets; feed intake and first choice preference were recorded. Proximate analysis revealed that noodle waste was a nutrient‑rich ingredient with high metabolizable energy, crude protein, and fat content. Aflatoxin levels remained within safe limits. Replacing maize with noodle waste raised energy and fat content but reduced dry matter, organic matter, and protein digestibility (P < 0.05), while fat digestibility was unaffected. Peak organic matter digestibility occurred at 50 % noodle waste inclusion. Palatability trials indicated that noodle waste could replace maize up to 50 % without affecting feed acceptance, with 25 % showing higher preference. Thus, 25 % inclusion was recommended for further in vivo evaluation as a viable maize alternative in canine dietary formulations.
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