All Free Veterinary Science MCQs with Answers
Every Veterinary Science question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
758 questions · page 7 of 38
- A. Washing the animal after every feeding
- B. Using post-milking teat disinfection
- C. Increasing the amount of grain in the ration
- D. Providing drinking water before milking
Explanation: Post-milking teat disinfection reduces the number of disease-causing organisms on the teat skin and helps protect the open teat canal.
Correct answer: Using post-milking teat disinfection- A. Rumen and reticulum
- B. Hooves and tail muscles
- C. Mammary gland and body reserves
- D. Liver and gall bladder
Explanation: A dry period allows mammary tissue to rest and regenerate before the next lactation.
Correct answer: Mammary gland and body reserves- A. Milk yield peaks immediately before calving
- B. Milk yield falls sharply during the first week in every cow
- C. Milk yield remains constant until the next calving
- D. Milk yield rises after calving and then gradually declines
Explanation: Milk production generally increases after calving, reaches a peak in early lactation, and then declines gradually.
Correct answer: Milk yield rises after calving and then gradually declines- A. The cow is using body reserves to meet an energy deficit
- B. The cow is receiving more energy than she can utilize
- C. The cow has stopped mobilizing fat after calving
- D. The cow is converting all dietary protein directly into milk fat
Explanation: Early-lactation cows often cannot consume enough feed to meet the energy required for milk production, creating a negative energy balance.
Correct answer: The cow is using body reserves to meet an energy deficit- A. Haymaking
- B. Silage making
- C. Sun drying
- D. Mechanical chopping alone
Explanation: Silage is preserved in an oxygen-limited environment, where lactic acid bacteria ferment soluble sugars and lower the pH.
Correct answer: Silage making- A. To prevent the cow from drinking excess water
- B. To eliminate the need for mineral supplementation
- C. To maintain rumination and proper rumen function
- D. To increase milk protein without affecting digestion
Explanation: Effective fibre stimulates chewing and saliva production, which helps maintain rumen pH and normal rumination.
Correct answer: To maintain rumination and proper rumen function- A. The cow spends more time lying quietly
- B. The cow stops drinking water for the entire day
- C. The cow has a permanent rise in body temperature
- D. The cow stands to be mounted by another cow
Explanation: Standing to be mounted is the most reliable visible sign of oestrus in cattle.
Correct answer: The cow stands to be mounted by another cow- A. To reduce contamination of milk and udder infections
- B. To increase the fat percentage of every milk sample
- C. To make cows produce milk without a dry period
- D. To replace the need for balanced feed management
Explanation: Clean housing, udders, hands, and equipment reduce bacterial contamination of milk and lower the risk of mastitis.
Correct answer: To reduce contamination of milk and udder infections- A. Restrict water until the calf begins grazing
- B. Offer clean water and starter feed in addition to milk
- C. Feed only mature forage until rumination is complete
- D. Provide antibiotics routinely without signs of disease
Explanation: Clean water supports rumen development and helps the calf consume calf starter, while milk supplies early nutrients.
Correct answer: Offer clean water and starter feed in addition to milk- A. To reduce the cow's water intake
- B. To increase teat canal closure
- C. To prevent sudden rumen acidosis
- D. To delay the return of ovarian activity
Explanation: A gradual increase allows rumen microbes to adapt to greater amounts of rapidly fermentable feed.
Correct answer: To prevent sudden rumen acidosis- A. Marked improvement in feed intake
- B. Reduced body temperature with shivering
- C. Increased cud chewing after feeding
- D. Increased respiration rate with panting
Explanation: Panting and an elevated respiration rate are common immediate responses to heat stress as the cow attempts to lose body heat.
Correct answer: Increased respiration rate with panting- A. They support selection and feeding decisions
- B. They eliminate the need for veterinary examinations
- C. They guarantee a fixed calving interval
- D. They prevent all infectious diseases
Explanation: Individual records help identify productive animals, evaluate feeding responses, and detect changes that may indicate illness.
Correct answer: They support selection and feeding decisions- A. Withholding water during the first week after calving
- B. Maintaining adequate fibre and controlled concentrate feeding
- C. Providing only finely ground grain before calving
- D. Keeping the cow fasting for several hours daily
Explanation: Adequate physically effective fibre and a carefully managed transition ration help maintain rumen fill and normal gastrointestinal…
Correct answer: Maintaining adequate fibre and controlled concentrate feeding- A. When its milk intake is at its highest
- B. When it reaches one week of age
- C. When it consumes sufficient starter feed consistently
- D. When it begins licking the dam's salt block
Explanation: Weaning is based mainly on consistent intake of adequate calf starter, because this shows that the rumen can supply nutrients after milk…
Correct answer: When it consumes sufficient starter feed consistently- A. Coat colour distribution
- B. Average horn length
- C. Daily salt consumption
- D. Calving interval
Explanation: Calving interval reflects the time between successive calvings and is influenced by oestrus detection, conception, and pregnancy…
Correct answer: Calving interval- A. Water supports milk synthesis and helps replace fluid losses
- B. Water permanently increases the butterfat percentage
- C. Water prevents every form of udder infection
- D. Water substitutes for adequate dietary fibre
Explanation: Milk contains a large proportion of water, so adequate intake is essential for maintaining production and replacing fluid losses.
Correct answer: Water supports milk synthesis and helps replace fluid losses- A. Replacing the entire ration at one feeding
- B. Mixing it in progressively over several days
- C. Offering it only after prolonged fasting
- D. Adding large amounts of grain without roughage
Explanation: Progressive introduction gives rumen microorganisms time to adapt to changes in nutrient supply and fermentation.
Correct answer: Mixing it in progressively over several days- A. To synchronize all cows' ovulation
- B. To increase the animals' mature body size
- C. To detect and limit introduction of infectious diseases
- D. To improve the flavour of their milk
Explanation: Quarantine separates incoming animals while they are observed, tested, and treated when necessary before joining the resident herd.
Correct answer: To detect and limit introduction of infectious diseases- A. It allows selective eating of long forage
- B. It prevents all digestive disorders
- C. It eliminates the need for drinking water
- D. It provides a more uniform nutrient intake
Explanation: A total mixed ration combines forage and concentrates so that each mouthful has a similar nutrient composition.
Correct answer: It provides a more uniform nutrient intake- A. To reduce excessive claw growth and lameness
- B. To increase rumen fermentation
- C. To improve colostrum antibody levels
- D. To increase the cow's gestation length
Explanation: Regular hoof trimming maintains normal claw shape and weight bearing, which helps reduce lameness.
Correct answer: To reduce excessive claw growth and lameness