Dairy Bulls

Australian Cattle Vets deliver accurate advice about 

dairy bull breeding soundness evaluation


 An Australian Cattle Veterinarians Bull Breeding Soundness Evaluation is one of the most cost effective tools dairy farmers have to improve fertility on their farms and avoid reproductive disasters!

dairy bulls

  • AI conception rates have been declining in the dairy industry
  • Increased reliance/pressure on bulls
  • Recent studies in Tasmania and Victoria have shown high numbers of subfertile bulls (up to 50%)
  • The major risk factors identified would only be picked up by a complete Veterinary Bull Breeding Soundness Evaluation (VBBSE) by and Australian Cattle Vet
  • Australian Cattle Vets recommend that VBBSE should include semen morphology
  • Major risk factors identified include semen morphology, semen motility and penile problems (These would not have been identified without a complete Australian Cattle Vets Bull Evaluation)
  • Should test 1-2 month prior to use every year.
  • Just putting in more bulls does not overcome the problem of sub-fertile bulls


Bull Fact Sheets

Download the BULLCHECK™ Fact Sheet – Dairy


Why should we test dairy bulls?

bull graph

What is involved in a Australian Cattle Vets Bull Breeding Soundness Evaluation (VBBSE)?

  • Observation of the bull in yard and as walking up the race for BCS, lameness, conformation, eyes etc
  • Measurement and palpation of testicles, entire penis and sheath while behind the bull. +/- Ear-notch
  • Rectal examination to assess internal sexual organs and massage to begin stimulation.
  • Massage/electroejaculation to observe penis, erection and collect semen sample.
  • Assess semen grossly and assess motility crush side for gross motility and forward progressive motility.
  • Preserve sample for forwarding to laboratory for morphology (number of normal sperm)
  • Serving ability testing if required.
  • Provide a report to farmers.

Ensure bulls are looked after well

  • On farm at least 1-2 months prior to use
  • Ensure fully vaccinated, drenched and treated with appropriate anthelminthics
  • Have bulls on a rising plane of nutrition and not overly fat
  • Ensure bulls are not too young or too old
  • Ensure bulls have passed an examination by an Australian Cattle Veterinarian prior to use


The Australian Cattle Vets deliver accurate advice on bull breeding soundness evaluation.


An Australian Cattle Veterinarians Bull Breeding Soundness Evaluation uses prescribed assessments & summarises the result into in to five fertility components. If a bull meets all the minimum standards at all levels of the evaluation, it has a high probability of being fertile.

While a pass on Australian Cattle Veterinarians Bull Breeding Soundness Evaluation is not an express guarantee, but rather an indication of the potential breeding value of the bull in a normal mating situation.

Contact Australian Cattle Veterinarians for details of your nearest Australian Cattle Veterinarians’ accredited Bull Breeding Soundness Evaluation Veterinarian.


Australian Cattle Veterinarians Veterinary Bull Breeding Soundness Evaluation