Equalized paired feeding or paired feeding

EQUALIZED PAIRED/PAIRED FEEDING

  • In paired feeding, the feed intakes are completely controlled.
  • In this method of comparing two rations, the animals are fed alike in a preliminary period.
  • Then animals are selected by pairs and are kept on ration A and ration B and are fed same quantity of feed limiting the intakes of both to that of the animal consuming the lesser amount.
  • The two animals of the pair are similar in size, age and previous history.
  • But such equalities are not essential from pair to pair.
  • The equalization of feed intake is also limited to with in the pair.
  • Minimum of four pairs of animals are to be used to carry out statistical analysis.
  • In a¬†experiment in which the two rations under comparison were alike with the exception of the phosphorus carrier,both the rations contained same amount of phosphorus ¬†and in the same ratio to calcium. It is noted that for a given pair of rats the food intakes were substantially alike over the experimental period of 35 days.
  • When it is desired to compare three rations at the same time, the animals can be selected in trios.

Advantages

  • Properly conducted equalized feeding experiments have a distinct advantage over ad libitum method as regards to the adaptability of the results to statistical treatment.
  • Other things being equal, the larger the number of pairs or trios, the greater is the reliability of the results.

Disadvantages

  • The faster-growing animal is penalized because of restricted feeding.
  • As the animal on the superior ration increases in weight over its mate, its maintenance requirement becomes greater than that of its mate.
  • Under these conditions, an equal feed intake for both means, that the larger animal must be using a larger proportion for maintenance and less remains for growth promotion.
  • The frequent effect of a nutritionally deficient ration is to decrease feed consumption.
  • By limiting feed intake, the full effect of the better ration cannot express itself.
  • The method is not suitable for finding out how much superior one ration is to another for growth.
Last modified: Saturday, 12 November 2011, 9:58 AM