Evaluation of the chemical composition of dry dogfoods commercialized in Chile used for growing dogs Avaliação da composição química de rações comerciais no Chile, usadas para filhotes
The nutritional quality of dry dogfood commercialized in Chile for growing dogs was studied. Samples from at least three different batches of 26 dogfood brands were mixed. The resultant samples (n=26) were chemically analyzed to determine their concentrations of dry matter (DM), gross energy, fiber,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Minas Gerais
2008-02-01
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| Series: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000100030 |
| Summary: | The nutritional quality of dry dogfood commercialized in Chile for growing dogs was studied. Samples from at least three different batches of 26 dogfood brands were mixed. The resultant samples (n=26) were chemically analyzed to determine their concentrations of dry matter (DM), gross energy, fiber, ash, crude protein, essential amino acids, total fat, linoleic acid and minerals. The metabolizable energy (ME) content of each sample was estimated using modified atwater factors. The results from the chemical analyses were compared with the nutrient profiles published by the American Association of Feed Control Officials (AAFCO). Dogfoods that were found to contain an estimated ME of over 4,000kcal/kg DM were corrected for their high energy density before comparison. All of the dogfoods contained adequate levels of protein, total fat, linoleic acid, iron, copper, manganese and selenium. The concentration of tryptophan was adequate in 92.3% of the samples. All of the other essential amino acids were present in adequate quantities. However, the situation was different for many of the minerals. Only 92.3% of the dogfoods contained an adequate Ca:P ratio. A total of 96.2% of the dogfoods contained an adequate level of Ca, 96.2% for P, 96.2% for Mg, 92.3% for I, 88.5% for Cl, 80.8% for Na, 80.8% for Zn and only 34.6% were adequate for K content. Overall, only 23% of the dogfoods evaluated in this study fulfilled all of the requirements established by the AAFCO in terms of their content of crude protein, amino acids, total fat, linoleic acid, and minerals. It appears that the majority of the dogfoods evaluated in this study (77%) would not satisfy all nutritional requirements of the growing dog.<br>Determinou-se a qualidade nutricional de 26 rações para filhotes caninos comercializadas no Chile. As rações foram analisadas quimicamente e comparadas com as recomendações da American Association of Food Control Officials (AAFCO). Para as análises, utilizou-se uma amostra de cada ração, composta de pelo menos três lotes diferentes. Para cada amostra, foram determinados os conteúdos de matéria seca (MS), fibra, proteína bruta, aminoácidos essenciais, gordura, ácido linoléico e minerais. A energia metabolizável foi determinada mediante os fatores de conversão de Atwater e corrigida por sua densidade quando ultrapassava 4000kcal/kgMS. Todas as rações apresentaram conteúdos adequados de proteína, gordura, ácido linoléico, ferro, cobre, manganês e selênio. A concentração de triptofano foi adequada em 92,3% das rações, e a dos demais aminoácidos essenciais foi maior que a mínima recomendada. As maiores irregularidades foram encontradas no conteúdo de minerais, 92,3% das rações apresentaram uma adequada relação Ca:P. Foram observados níveis adequados de Ca, P e Mg em 96,2% das rações, de I em 92,3%, de Cl em 88,5%, de Na e Zn em 80,8% e de K em 34,6%. Em relação às concentrações de proteína, aminoácidos, gordura, ácido linoléico e minerais, somente 23% das rações apresentavam todas as especificações recomendadas pela AAFCO. A maioria das rações analisadas, (77%) apresentavam concentrações de nutrientes inferiores ao requerimento de filhotes caninos. |
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| ISSN: | 0102-0935 1678-4162 |