Maned wolves (Chrysocyon brachyurus) maintained in ex situ populations challenge veterinarians and managers with high neonatal mortality and parental incompetence. These challenges led to the development of a novel diagnostic approach for pregnancy detection using radiographic imaging without anesthesia or sedation. To do this, a specialized crate was constructed to easily contain a single maned wolf, allowing the capture of lateral projection radiographic images of the abdomen prior to and throughout a 66-day pregnancy (days 20, 34, 48, and 55 of 66). Radiographs taken at days 48 and 55 postbreeding showed evidence of neonatal skeleton mineralization, confirming pregnancy with two pups. The dam gave birth at day 66 to two pups. This technical report describes a novel approach without anesthesia for successful radiographic pregnancy detection and determination of litter size in the maned wolf, a midsize carnivore, using a specially constructed crate.
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