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Effect on Heifer Feeding Preference of Adding Flavor or Pelleting a Dairy Meal¹

Utah State University, Logan 84322 and Waikato University, Hamilton, New Zealand and Ruakura Agricultural Research Centre, Hamilton, New Zealand

ABSTRACT

Operant conditioning procedures were used to evaluate animal preferences among commercial dairy meals and pellets (crumbles) with and without added flavoring agent Firanor-36, and each of these feeds was compared with barley. Five nulliparous Friesian or Friesian: Jersey cross yearling heifers were experimental subjects. Concurrent, variable-interval 90-s schedules allowed heifer access to each of the paired feeds once every 90 s average. Daily sessions were for 20 min, and an average feed comparison trial was 19 days.

Preference ranking of feeds based on response proportions (left plate: total) was barley > plain crumbles > flavored crumbles > plain meal > flavored meal. Pellets were preferred over ground meal. Little preference was evident between barley and pelleted meals.

¹ Approved as Journal Article No. 2702 of the Utah State University Agricultural Experiment Station. Research was conducted at the Ruakura Agricultural Research Centre, Hamilton, New Zealand.

² Utah State University.

³ Waikato University.

⁴ Ruakura Agricultural Research Centre.

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