Soybean oil and beef tallow in dry extruded diets for adult dogs

Abstract

The aim of the study was to determine the effects of two different fat sources (soybean oil (SO) and beef tallow (BT)) in dry extruded dog diets on the intake of food and metabolizable energy (ME), on faecal characteristics and apparent total tract digestibility (ATTD) of nutrients and energy. Ten adult dogs of different breeds were used in a Latin square design. Five experimental diets were designed from a basal diet. A Control diet was coated with 1% SO and four other diets were obtained by coating the basal diet with 6.5% and 13% of SO or BT. The Control, 6.5% and 13% coated diets contained approximately 8.5%, 15% and 20% fat, respectively. The dogs had similar dry matter (DM) intakes and, consequently, higher ME intakes with an increased fat content for both sources (p < 0.05). Fat digestibility was highest for Diet SO13% (p < 0.05). The ATTD of DM and organic matter was highest (p < 0.05) for Diets SO13% and BT13%. Fat coating improved the faecal score, especially for Diet BT13%. The dietary ratios of protein:fat:carbohydrate [% of ME] were close to AAFCO's estimates. For SO a higher ATTD (99.1%) and ME content (38.88 MJ/kg) was estimated than for BT (ATTD 92.9% and 36.37 MJ ME/kg). Both SO and BT can comprise up to 13% of the diet. However, SO was more susceptible to leaking from the kibbles with the coating method applied.

Effects of dietary fat:carbohydrate ratio on nutrient digestibility, serum parameters, and production performance in male silver foxes (Vulpes vulpes) during the winter fur-growing period

“…Epidemiological and experimental evidence suggest that dietary F:C ratio affects BW through energy surfeits facilitated by the high energy density of fat (Lissner and Heitmann 1995). Increasing dietary F:C ratio from 34:34 to 48:22 resulted in an increase in ADMI, which was expected and agrees with the data of Marx et al (2015) who studied that there was an increased in energy intake when dog fed high-fat diet. We speculate that the high F:C ratio diets is motivated by the correspondingly higher ME intake and, thereby, the higher BWs.…”

Extruded feline diets formulated with high inclusion of soybean hulls: effects on apparent total tract macronutrient digestibility, and fecal quality and metabolites

“…For comparison, choice white grease has an unsaturated:saturated ratio of 0.31, compared with beef tallow (0.08), poultry fat (0.71), and soybean oil (4.07; NRC, 2006). Diets containing higher amounts of unsaturated fats (i.e., soybean oil) have been demonstrated to have higher fat digestibility by dogs (Marx et al, 2015), which may have influenced the coefficients of AHF digestibility observed in the present study.…”

Endogenous fat losses and true and apparent fat digestibility in adult and growing dogs fed diets containing poultry offal fat

“…Hyperbolic effect given by the equation: y = 98.5 − 13.62/x (R 2 = 0.72; SE = 1.1) F I G U R E 3 Fat digestibility (CTTAD, %) as a function of AHEE intake (g per kg BW per day) of puppies. Hyperbolic effect given by the equation: y = 99.1 − 26.13/x (R 2 = 0.613; SE = 1.30) Romsos, Hornshus, and Leveille (1978), Kendall, Holme, and Smith (1982), Marx et al (2015) and Marx et al (2017). Fat is a highly digestible energy source, and most fat sources included in dog and cat foods have CTTAD greater than 90.0%.…”

“…Although some studies on the digestibility of several fat sources for dogs and cats are published (Marx, Trevizan, & Ahlstrøm, 2015), there is little information on nutrient utilization in dogs younger than 1 year of age (Swanson, Kuzmuk, Schook, & Fahey, 2004) or on the digestibility of different nutrients for dogs of different ages (Taylor, Adams, & Neville, 1995; Weber, Martin, Biourge, Nguyen, & Dumon, 2003).…”