Evaluation and treatment of decreased libido associated with painful lumbar lesions in two bulls.

Painful lesions of the vertebral column may cause decreased libido in bulls. Radiographic evaluation of vertebral skeletal problems in mature bulls is limited because of high body mass. Two breeding bulls with signs of decreased libido and spermatozoa production were evaluated. Initial systemic medical treatment for the conditions had not focused on localized lesions and was unsuccessful. Nuclear scintigraphy was performed in both bulls to determine the location of vertebral column lesions and facilitate localized treatment. Localized medical treatment was successful and resulted in decreased signs of pain and increased spermatozoa production in both bulls.