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Effects of spray-dried animal plasma on intake and apparent digestibility in dogs¹

APC, Inc., Ankeny, IA 50021

² Correspondence: 2425 SE Oak Tree Court (phone: 515-289-7600; fax: 515-289-4360; e-mail: jim.quigley{at}amerprotcorp.com).

Abstract

Effects of spray-dried animal plasma (SDAP) on intake and apparent digestibility of major dietary components were determined using 22 adult Beagles. Trials 1 and 2 used six and eight dogs, respectively, in a switchback design using 10-d periods. Trial 3 used eight dogs in a replicated 4 x 4 Latin square design with 15-d periods. The final 5 d of each period were used for measurement of intake and fecal collections. In Trial 1, dry extruded dog food kibbles were coated with 5% tallow, 2% commercial flavor, and 0 or 2% SDAP (as-fed basis). In Trial 2, commercially available dry dog food, previously coated with fat and flavor were coated with 0 or 2% SDAP. In Trial 3, SDAP (0, 1, 2, or 3%) was blended with other ingredients and extruded (as-fed basis). Kibbles were subsequently coated with 5% poultry fat and 1% commercial flavor. Intake, fecal consistency, and apparent digestibility of nutrients were determined. Addition of SDAP did not markedly affect chemical composition of diets and did not affect intake. Digestibility of DM was improved (P < 0.04) an average of 3.2% when 2% SDAP was included in the diet for all trials. Organic matter digestibility was improved (P < 0.01) in Trials 2 and 3 by an average of 2.9%. Also, digestibility of crude fiber (Trials 1 and 2) or total dietary fiber (Trial 3) was increased with addition of SDAP to the diet (P < 0.01). Fecal DM excretion was decreased by an average of 15% across all trials with the addition of SDAP. Spray-dried animal plasma was an acceptable ingredient in dry dog food preparations, resulting in improved digestion and decreased fecal output. Changes in digestion that occurred with addition of SDAP suggested alteration in digestive capacity in dogs.

Key Words: Blood Proteins • Canine • Digestibility

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