Evaluation of two milk replacers in the artificial rearing of Anglo-Nubian female goat kids | Evaluación de dos lacto-reemplazantes en la crianza artificial de cabritas Anglo-Nubian

anglais. Dairy goat production is an alternative for rural development in Buenos Aires province, Argentina. Artificial rearing with milk replacers allows all goat milk to be intended for milking. Although this technology is widespread in cattle, more studies are needed in goats. The aim was to evaluate the artificial rearing of Anglo-Nubian female kids, according to two milk replacers: commercial small ruminant milk replacer (MR) vs. whole cow milk powder (MP). Milk replacers were offered until week 10 of life according to a protocol, complimenting it with solid food after week three. The following were evaluated: survival (SUR), live weight (LW), daily live weight gain (DLWG), age (week) in which the kids reached 10 kg (LW10) and multiplied by 2.5 their birth weight (BWx2.5), glycemia (GLY), diarrhea incidence (DI), and cost of milk replacer per kid (COST). SUR was 100% in both treatments. Despite detecting differences in LW in week six in favor of MP, both groups reached similar LW at the end of the rearing period. Results for DLWG, LW10, BWx2.5, and DI did not differ between treatments. There was no effect of treatment on GLY; however, age affected it. COST was lower for MR. It is concluded that, although both milk replacers allow similar and adequate growth of kids, the use of a milk replacer formulated for small ruminants significantly reduces the cost of artificial rearing.

espagnol; castillan. El tambo caprino es una alternativa productiva para el desarrollo rural en la provincia de Buenos Aires, Argentina. La crianza artificial con lacto reemplazantes permite destinar toda la leche al ordeñe. Si bien esta tecnología está ampliamente difundida en vacunos, son necesarios más estudios en caprinos. El objetivo fue evaluar la crianza artificial de cabritas Anglo Nubian según dos lacto-reemplazantes: sustituto lácteo formulado para rumiantes menores (MR) vs. leche en polvo entera vacuna (MP). Los lacto reemplazantes fueron ofrecidos hasta la semana 10 de vida según protocolo, complementándose a partir de la semana 3 con alimento sólido. Se evaluó: supervivencia (SUR), peso vivo (LW), ganancia diaria de peso vivo (DLWG), semana en que las cabritas alcanzaron 10 kg (LW10) y multiplicaron por 2,5 su peso al nacimiento (BWx2,5), glucemia (GLY), cuadros diarreicos (DI) y costo del lacto-reemplazante por cabrita (COST). SUR fue del 100% en ambos tratamientos. Pese a detectarse diferencias en el LW en la semana seis a favor de MP, al final del período de crianza, ambos grupos alcanzaron similar LW. Tampoco se encontraron diferencias entre los tratamientos para DLWG, LW10, BWx2,5 y DI. No hubo efecto del tratamiento sobre GLY, aunque hubo efecto de la edad. COST fue menor para MR. Se concluye que ambos lacto-reemplazantes permiten un crecimiento similar y adecuado de las cabritas. Sin embargo, la utilización del sustituto lácteo formulado para rumiantes menores disminuye significativamente los costos de la crianza artificial.