In this study, effects of different levels of feeding on digestibility, body weight(BW), body condition score(BCS) and some stool parameters were investigated. Fifteen adult Golden Retriever dogs were divided into 3 groups. ME content of food and ME requirements of the dogs were determined by the modified Atwater factors and the FEDIAF equation(95*BW 0.75 ). The first group was fed 50% less than daily metabolic energy requirement(MER)(1), second group was fed 100%(2) and the third group was fed 50% more than the MER(3). Trial lasted 15 days. Stools were scored and stool samples were taken in last 4 days of the study. Dry matter(DMD) and organic matter digestibilities(OMD) were determined by acid-insoluble ash indicator method. BW and BCS values were determined on the 7th and 15th days. Changes in BW and BCS between days and groups were insignificant(P>0.05). DMD and OMD values were the highest in groups 1 and 2(P<0.05). Group 1 had the highest stool score(P<0.05). There was no significant difference in stool DM levels between all groups(P>0.05). In conclusion, modified Atwater factors and formula 95*BW 0.75 were sufficient to preserve BW and BCS for this 15-day study. More studies are needed to compare the different formulas used to calculate the energy needs of dogs and the energy content in their diets. BW and BCS changes should be demonstrated with long-term trials. Effects of daily amount of food determined by the formulas on digestibility and health of dogs should also be investigated.
Melatonin is a molecule that plays an active role in reducing many stress factors in plants and has important functions in the growth, development and reproduction of plants. It has many physiological functions that directly affect feed consumption, feed efficiency, energy metabolism and immune system in animal organisms. In addition, its anti-inflammatory, antioxidant, anticancer and antiapoptotic effects are also known. While melatonin has an antioxidative effect at low doses, it can exert a prooxidant effect at high doses. It has been suggested that when melatonin is used as a silage additive, it increases the total acid content of the silage and significantly improves the silage fermentation quality by lowering the pH level and butyric acid. Although it has positive effects on mammary gland involution and general health in ruminants, its effects on yield parameters have not been proven. Broilers and layers are expected high productivity and performance, in this regard, they are faced with stress factors such as intensive feeding and housing conditions. Considering its positive effects on stress factors, health and productivity, melatonin is a promising feed additive. Effects of melatonin additive or supplements on animal productivity and health should be revealed in further studies.
Köpeklerin sağlıklı beslenmesine önem veren insanların sayısı gün geçtikçe artmaktadır. Bundan dolayı fonksiyonel faydaları olduğu bilinen gıdalar ve katkılar köpek sahipleri arasında popülerlik kazanmaktadır. Artan bu ilgi ile birlikte evcil hayvanların sağlığını optimize etmek için fonksiyonel katkıların rolü önem kazanmaya başlamıştır. Biyoaktif fonksiyonel özellikleri nedeniyle sık kullanılan bitkilerden biri de Yucca schidigera’dır. Yucca ekstraktı insan, at, çiftlik hayvanları ve kedi-köpek diyetlerinde uzun süredir yem katkı maddesi olarak kullanılmaktadır. Yucca tozunun veya ekstraktının ana bileşenleri, antioksidan, antienflamatuar, antiviral, antiprotozoal, antimutajenik, antikanser ve kolesterol azaltımına sahip steroidal saponinler, polisakkaritler ve polifenollerdir. Yucca sağlık ve performansa olumlu etkileri, besin madde yararlanımı artırma, dışkı kokusunu azaltma, amonyak ve hidrojen sülfit gibi bazı zararlı uçucu bileşiklerin giderilmesi amacıyla köpeklerde diyet katkı maddesi olarak değerlendirilir. Fakat, dışkı kokusunu azaltıcı etkileri dışında köpekler üzerindeki etkileri bilinmemektedir. Bu derlemede Yucca schidigera’nın köpeklerde sağlık, sindirilebilirlik, dışkı kokusu, bağırsak gazı oluşumu, kan parametreleri, oksidasyon ve dışkı mikrobiyotasına olan etkileri açıklanmıştır.
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