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Bull Breeding Soundness Evaluation

Bull Breeding Soundness Evaluation. Thanks to Dr. Rod Christmas. Objectives. Breeding Soundness Evaluation Components Physical Exam/Conformation Faults External and Internal Genital Exam Semen Exam Classification. Indications . Pre-Breeding Pre-Purchase Post-Purchase If any questions.

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Bull Breeding Soundness Evaluation

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  1. Bull Breeding Soundness Evaluation Thanks to Dr. Rod Christmas

  2. Objectives Breeding Soundness Evaluation Components • Physical Exam/Conformation Faults • External and Internal Genital Exam • Semen Exam • Classification

  3. Indications • Pre-Breeding • Pre-Purchase • Post-Purchase • If any questions

  4. Medical History • Vaccinations • Previous Health Information

  5. Management History • Feed • Previous Use • Breeding Behavior • Penis during Breeding

  6. Physical ExamLocomotion

  7. Physical ExamSkin

  8. Physical ExamPermanent ID

  9. Physical ExamPermanent ID

  10. Physical ExamEyes

  11. Physical ExamEyes

  12. Physical ExamTeeth

  13. Rear Limb conformation • Locomotion--Critical. • Sickle Hocked • Cow Hocked • Post Legged • Crooked Legs/Feet

  14. Rear Limb Conformation

  15. Musculoskeletal disease • Joints • Laminitis • Scars around coronary band • Interdigital growths • Footrot • Hoof Cracks

  16. Interdigital Fibroma

  17. Examination of Underline

  18. Visual Exam of Scrotum • Scrotal Conformation • Evidence of Injury • Skin Lesions

  19. Palpation • Ensure There Are Two • Free & Moveable • Tone • Symmetry • Epididymis

  20. Atrophied Left Testicle

  21. Scrotal Circumference • Indicates Fertility & Puberty • Ensure Both Testicles are In Scrotum • Cradle Scrotal Neck • Place Tape at Largest Diameter • Pull until Skin Indents

  22. Scrotal Circumference Tape

  23. Proper Tape Placement

  24. Incorrect Hand Placement

  25. Measurement

  26. Breed listing of 205 day scrotal circumference need to produce an average yearling scrotal circumference of 32 cm Adapted for Geske, J.M.,et.al:Proceeding annual Meeting, Beef Improvement Federation (1994):225-231.

  27. Internal Reproductive Organ Exam • Seminal Vesicles • Ampulla • Prostate Gland • Penis (internal portion) • Inguinal Rings

  28. Internal Genital Organs

  29. Importance of Rectal Exam • Pathology of Internal Reproductive Organs • Stimulation

  30. Methods of Collection • Manual Massage • Artificial Vagina • Electroejaculation

  31. Collecting Semen with Artificial Vagina

  32. Electroejaculation

  33. External Exam of Penis & Prepuce • Incomplete Extension • Frenulum • Hair Rings • Fibropapillomas (Warts) • Prolapse of Prepuce • Lacerations • Adhesions

  34. Penile Hair Ring

  35. Persistent Frenulum

  36. Penile Fibropapilloma

  37. Semen Evaluation Equipment

  38. Semen Evaluation Motility

  39. Semen Evaluation Morphology • Determined at 1000X • Eosin-nigrosin stain • 70% Normal

  40. Making Slide

  41. Normal Bovine Sperm

  42. Common Sperm Abnormalities

  43. Common Sperm Abnormalities

  44. Classification of Bulls • Satisfactory Potential Breeder • Deferred • Unsatisfactory Potential Breeder

  45. Society for Theriogenology

  46. Additional Testing • Trichomonas Cultures • Brucellosis • Pelvic Measurement • Hip Height • Carcass Ultrasound

  47. Preputial Culture

  48. Trichomoniasis • Diagnosis: • Smear - detect high numbers • Culture - In-Pouch® - culture or transport • Bulls better to culture - serial cultures from bulls

  49. Economics of Testing • 10-20% of All Bulls Tested will Fail the Examination • 10% of Bulls that Pass will have Substandard Fertility Compared to Others -Pass the Standards, but have Inherent Infertility

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