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Imprecision when using measuring cups to weigh out extruded dry kibbled food
A J German1, S L Holden, S L Mason
1School of Veterinary Science, University of Liverpool, Neston, Wirral, UK. ajgerman@liv.ac.uk
Journal of Animal Physiology and Animal Nutrition
|November 3, 2010
Summary
Measuring cups are imprecise for feeding dry pet food, leading to significant over- or under-estimation of portions. This inaccuracy in pet nutrition can contribute to weight gain and obesity in cats and dogs.
Area of Science:
- Veterinary Nutrition
- Companion Animal Health
Background:
- Dry extruded kibbled food is a common diet for pet cats and dogs.
- Feeding is typically done using measuring cups, but the accuracy of this method is unknown.
Purpose of the Study:
- To assess the precision and accuracy of using measuring cups to portion dry kibbled pet food across multiple studies.
Main Methods:
- Evaluated portioning of various dry kibbled foods using measuring cups over 12 studies.
- Assessed both precision (intra- and inter-subject variation) and accuracy (deviation from intended portion size).
Main Results:
- All studies showed poor precision, with coefficients of variation ranging from 2-13% (intra-subject) and 2-28% (inter-subject).
- Accuracy varied significantly, with portion sizes underestimated by up to 18% and overestimated by up to 80%.
- Inaccuracy correlated negatively with portion size and positively with the number of subjects.
Conclusions:
- Using measuring cups for dry kibbled pet food is imprecise and inaccurate.
- Consistent errors in portioning can lead to gradual weight gain and obesity in pets.
- This imprecision may hinder the success of weight management programs for overweight animals.
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