OF INCORPORATION OF POULTRY SLAUGHTER WASTE ON GROWTH AND NUTRIENT DIGESTIBILITY IN DOG DIETS
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Date
2008-03
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SRI VENKATESWARA VETERINARY UNIVERSITY , TIRUPATI-517502
Abstract
ABSTRACT :
An attempt has been made in the present study to find the chemical composition of poultry slaughter waste and to assess the effect of incorporation of poultry slaughter waste at 0, 10 and 20 per cent levels in dog diets. The performance of Labrador dogs was studied in a growth cum digestion trial. Twelve Labrador dogs with an average body weight of 3.83 kg were distributed into 3 groups each comprising 4 dogs.
The poultry slaughter waste was cleaned, autoclaved (1kg/cm2 for 30 min) and subsequently dried in tray drier (100 0C for 8 hours). Processed PSW was ground and analyzed for chemical composition which revealed 94.18, 91.21, 36.92, 25.02, 0.56, 8.19 and 8.79 per cent DM, OM, CP, EE, CF, NFE and TA, respectively. This could be a valuable protein source in dog diets.
Three experimental dog diets were formulated from maize, soybean meal, rice broken, wheat, wheat bran, oil, salt, preservatives, vitamins and
mineral mixture. Processed poultry slaughter waste included in diet 2 and diet 3 at 10 and 20 per cent levels, respectively. All the three diets were extruded out. These experimental diets were fed to the Labrador dogs for a period of 91 days (81 days growth trial and 7 days digestibility trial).
During the growth trial the ADG of Labrador dogs was 109.56 ± 7.62, 122.95 ± 3.39 and 124.46 ± 4.49 for diet 1 (control), diet 2 (10 %PSW) and diet 3 (20%PSW) respectively. There was no significant (P>0.05) difference in ADG among the diets. The feed efficiency (g) was higher in Labrador dogs fed diet 3 (2.44 ± 0.09) followed by diet 2 (2.49 ± 0.08) and diet 1 (2.88 ± 0.20). However feed efficiency was statistically (P>0.05) insignificant. The DM efficiency was not significant (P>0.05) among the diets, but numerically 14.73, 12.79 per cent more DM efficiency was observed in diet 3 and diet 2 compared to the control. The CP efficiency was found to be 13.56 per cent more for diet 3 and diet 2 compared to the control. CP efficiency of diet 2 and diet 3 was similar. There was no significant (P>0.05) difference in CP efficiency among the diets. The ME efficiency (kcal/g gain) of diet 3 (8.82 ± 0.33) and diet 2 (8.92 ± 0.27) were significantly (P<0.05) higher than control (10.64 ± 0.73) while diet 2 and diet 3 were comparable.
A digestibility trial was conducted at the end of the experiment. The DMI/100 kg body weight was comparable among the diets, however 3.58, 8.14 per cent more DMI for diet 1 was observed compared to diet 2 and diet 3 respectively. The DM digestibility of diet 3 (68.33 ± 0.85) was significantly (P<0.05) higher than diet 1 (63.75 ± 0.93) while DM digestibility of diet 2 (65.82 ± 0.84) was comparable to diet 1 and diet 3. There was no significant difference in the digestibility of OM, CP and NFE. The CF digestibility of diet 3
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Keywords
poultry slaughter waste; chemical composition; dog diets; NUTRIENT DIGESTIBILITY