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Research Note: Comparing methods to assess Valgus-Varus deformity in broiler chickens.

H van den Brand1, R Molenaar1, M Klaasen2

  • 1Adaptation Physiology Group, Wageningen University and Research, Wageningen, The Netherlands.

Poultry Science
|May 6, 2022
PubMed
Summary
This summary is machine-generated.

Fixing the femorotibiotarsal joint is essential for accurately measuring valgus-varus deformity (VVD) in broiler chickens. This method ensures consistent angulation measurements across live, dead, or dissected specimens, improving VVD assessment.

Keywords:
broilerleg healthmethodologyvalgus-varus deformity

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Area of Science:

  • Animal Science
  • Veterinary Medicine
  • Biomechanics

Background:

  • Valgus-varus deformity (VVD) significantly impacts broiler chicken welfare and health.
  • Accurate assessment of VVD prevalence and severity is crucial for effective management.

Purpose of the Study:

  • To evaluate the influence of five distinct measurement protocols on tibiotarsal-tarsometatarsal joint angulation in broiler chickens.
  • To determine the most reliable method for assessing VVD in broiler chickens.

Main Methods:

  • Five protocols were tested: live chickens with femorotibiotarsal joint fixation, dead chickens without fixation, dead chickens with fixation, dissected legs with muscles (no skin), and dissected legs without muscles (intact joints).
  • Tibiotarsal-tarsometatarsal joint angulation was measured for each protocol.

Main Results:

  • Fixation of the femorotibiotarsal joint significantly reduced joint angulation.
  • No significant differences in angulation were observed between live, dead, or dissected legs when fixation was applied.
  • Without fixation, angulation was considerably higher, primarily due to lateral leg deviation.

Conclusions:

  • Femorotibiotarsal joint fixation is critical for accurate VVD angulation measurement in intact broiler chickens.
  • Standardizing measurement protocols with fixation is essential for reliable VVD assessment in research and practice.