科研之友
微信
新浪微博
Facebook
分享链接
摘要
The diet of the domestic dog has changed significantly from that of its wolf ancestor, with to date only two studies having examined macronutrient self-selection in dogs. Whilst the first focused solely on protein intake, determining an intake of 30% metabolisable energy (ME), the second investigated dietary protein, fat and carbohydrate (PFC), indicating an intake ratio of 30:63:7% by energy. This study's aim was to further elucidate macronutrient intake by providing greater macronutrient range, energy content, and to investigate over a longer duration than previous studies. Fifteen adult dogs were given access to three wet diets providing 500% of daily ME, twice daily over 10days. The diets were nutritionally complete and formulated using the same four ingredients in different proportions to supply high levels of protein (58% ME), fat (86% ME) or carbohydrate (54% ME). Overall fat and carbohydrate consumption significantly declined from 6,382 to 917kcals per day (p<0.001) and 553 to 214kcalsday(-1) (p<.01) respectively. Protein intake, however, remained constant over the study and ranged from 4,786 to 4,156kcalsday(-1). Such results impacted on percentage total energy intake, with fat decreasing from 68% to 52% (p<.001) and protein increasing from 29% to 44% (p<.01). Our findings suggest that dogs still possess a feast or famine mentality, wherein energy dense fat is prioritised over protein initially. With continued feeding over 10days, a transition to a more balanced energy contribution from both macronutrients is evident. The study also shows that given the option, dogs do not select carbohydrate to be a significant portion of the diet. The health implications of such dietary selection are of interest.
- 出版日期2018-4
