Temperament Isn't Just About Safety; It Affects Everything
Bull temperament directly impacts handler safety, breeding efficiency, and offspring behavior. Selecting bulls with acceptable temperament is not just a safety decision; it affects conception rates, calf performance, meat quality, and long-term herd manageability. This guide covers temperament assessment methods, selection criteria, and the balance between docility and reproductive vigor.
Why Temperament Matters
Safety Impact
Bulls with poor temperament account for a disproportionate share of livestock injuries, require more labor and resources to handle, create dangerous situations for family members, may injure cows during breeding, and pass aggressive tendencies to their offspring.
Economic Impact
| Area | Effect of Poor Temperament |
|---|---|
| Handling costs | Increased labor, facilities, injury risk |
| Breeding efficiency | Aggressive bulls may disrupt breeding |
| Calf performance | Stressed calves grow slower |
| Meat quality | Stress affects carcass quality |
| Culling rates | More animals culled for behavior |
| Future herd | Offspring inherit tendencies |
Research Findings
Studies consistently show that temperament is moderately heritable (h-squared = 0.25-0.45), calm cattle gain 0.15-0.20 lbs/day more than excitable cattle, docile cattle have better immune function, temperament correlates with fertility (calmer animals have higher conception rates), and excitable cattle produce tougher meat.
Temperament Scoring Systems
Standard 1-5 Scoring Scale
| Score | Description | Typical Behavior |
|---|---|---|
| 1 | Docile | Walks slowly, easily handled, shows no aggression |
| 2 | Slightly restless | May move quickly but settles down |
| 3 | Restless | Moves quickly, pushes against handlers, doesn't settle easily |
| 4 | Very restless | Aggressive movements, may attempt to jump, hits facilities |
| 5 | Aggressive | Attacks handlers, jumps fences, dangerous |
Detailed 1-6 Scoring (BIF Guidelines)
Beef Improvement Federation scoring:
| Score | Chute Behavior |
|---|---|
| 1 | Docile, mild disposition, gentle and easily handled, settles quickly |
| 2 | Restless, shifting in chute, settled down quickly |
| 3 | Nervous, quivering, some movement, settled with pressure |
| 4 | Wild, jumping, not settling, attempting to escape |
| 5 | Highly aggressive, attacking panels, endangering handlers |
| 6 | Very aggressive, attack behavior, must exit immediately |
Exit Velocity Measurement
Exit velocity provides an objective measure of temperament. Time the animal exiting the chute over a fixed distance: faster exit equals more excitable. Electronic timers make this practical, and the measurement complements visual scoring nicely.
| Exit Speed | Temperament Indication |
|---|---|
| Slow walk | Very calm |
| Brisk walk | Normal |
| Trot | Somewhat excitable |
| Running | Excitable |
| Bolting | Highly excitable |
Assessing Bull Temperament
When to Evaluate
Score temperament at weaning (to establish a baseline), during yearling development, at BSE time (pre-purchase or annually), during routine handling, and when considering an animal for the breeding herd.
Evaluation Situations
| Situation | What to Observe |
|---|---|
| Approaching in pasture | Does he move away, stand, or approach aggressively? |
| In alley/chute | Calm, nervous, or fighting? |
| During restraint | Accepts handling or becomes dangerous? |
| Post-release | Calm exit or charges? |
| Around cows | Aggressive with cows during breeding? |
Environmental Factors
Consider context when scoring. Handling history affects behavior, novel situations increase excitability, pain from feet or injury increases reactivity, time of year matters (breeding season raises aggression), and social dynamics play a role (dominant versus subordinate animals behave differently).
Bull Temperament Assessment Form
``` +-----------------------------------------------------------------------------+ | BULL TEMPERAMENT EVALUATION | +-----------------------------------------------------------------------------+ | Bull ID: ____________ Breed: ____________ Age: _______ | | Date: ___/___/___ Evaluator: _____________ | +-----------------------------------------------------------------------------+
| CHUTE BEHAVIOR (score 1-6): |
|---|
| ( ) 1 - Docile, stands quietly |
| ( ) 2 - Slightly restless, settles quickly |
| ( ) 3 - Nervous, some movement, settles with time |
| ( ) 4 - Restless, hitting sides, doesn't settle |
| ( ) 5 - Aggressive, attempting escape, dangerous |
| ( ) 6 - Violent, attacking, requires immediate release |
| EXIT BEHAVIOR: |
|---|
| ( ) Walks out calmly |
| ( ) Trots out, quickly calms |
| ( ) Runs out, looks back |
| ( ) Bolts, returns to challenge |
| PEN BEHAVIOR (observe from outside pen): |
|---|
| ( ) Ignores observer |
| ( ) Watches observer, doesn't approach |
| ( ) Moves away from observer |
| ( ) Approaches observer curiously |
| ( ) Approaches observer with head lowered/aggressively |
| FLIGHT ZONE SIZE (estimated): |
|---|
| ( ) Small (<10 ft) - very calm |
| ( ) Normal (10-25 ft) |
| ( ) Large (>25 ft) - flighty |
| ( ) No consistent flight zone - unpredictable |
| OVERALL TEMPERAMENT SCORE: _____ |
|---|
| RECOMMENDATION: |
| ( ) Acceptable for breeding herd |
| ( ) Marginal - monitor closely |
| ( ) Cull - not safe for herd |
Selecting for Good Temperament
Selection Criteria
Keep bulls that handle calmly in facilities, respond to pressure appropriately, have calm dams (check if known), and come from herds selected for temperament.
Cull bulls that show unpredictable aggression, have attacked or threatened handlers, come from lines with aggression history, or do not improve with handling.
Heritability Considerations
Since temperament is moderately heritable, selecting calm bulls improves offspring disposition. Culling aggressive bulls removes bad genetics from the herd. Dam temperament is equally important, and it may take several generations to see meaningful herd improvement. Consistent selection pressure is necessary because one generation of loose standards can undo years of progress.
Breed Considerations
| Breed Type | General Tendency | Notes |
|---|---|---|
| British (Angus, Hereford) | Generally calm | Selected for docility |
| Continental (Charolais, Limousin) | More variable | Can be excellent or problematic |
| Brahman-influenced | Variable | Sensitive, can be calm if handled well |
| Dairy breeds | Often aggressive | Less selection for temperament |
The Hand-Raised Bull Dilemma
Why Hand-Raised Bulls Are Dangerous
Hand-raised bulls lose their natural fear of humans and begin to see humans as herd members. As they mature, they challenge humans for dominance. Ironically, the "calmest" calves often become the most dangerous bulls.
Signs of Problem Socialization
| Behavior | Concern Level |
|---|---|
| Pushes handler with head | High (dominance testing) |
| Rubs on handler | High (treating as herd member) |
| Doesn't respect personal space | Moderate to high |
| Approaches handler aggressively | Critical (cull immediately) |
| "Friendly" approaching without fear | Moderate (monitor) |
Prevention
Never play with bull calves, and do not let children interact with them. Maintain a flight zone from early age, do not let a calf rub on you, and feed from a distance when possible. These habits need to start from birth.
Management of Previously Hand-Raised Bulls
If you have a hand-raised bull, never trust him regardless of history. Always use barriers when handling, never turn your back, and consider culling before an incident occurs. Document his behavior for future reference.
Temperament vs. Libido
Balancing Traits
A common misconception is that aggressive bulls have higher breeding drive. In reality, calm bulls can have excellent libido. Aggressive behavior does not equal high libido, and some aggressive bulls actually have poor breeding efficiency because they spend more energy fighting than breeding.
What to Look For
Good breeding temperament means the bull shows appropriate breeding behavior with cows, is not aggressive with cows during mating, actively breeds when turned out, and responds to estrus cues.
Red flags include calm bulls with low libido, bulls that injure cows during breeding, and bulls that fight excessively with other bulls instead of working cows.
Temperament Trends Over Time
Age-Related Changes
| Life Stage | Typical Pattern |
|---|---|
| Calf | Establish baseline |
| Yearling | May increase nervousness |
| 2-3 years | Usually settling down |
| Mature | Relatively stable |
| Breeding season | Temporary increase in aggression |
| Aged | Some become more docile, some more dangerous |
Handling Effect
Good handling improves genetic potential. Low-stress facilities help, consistent handlers produce better results, and young cattle are the most moldable. Bad handling worsens genetic tendencies through pain during handling (hot shots and rough treatment), scary experiences that the animal remembers, and negative associations that compound over time.
EPDs for Temperament
Docility EPD
Some breed associations publish Docility EPDs. Higher values indicate calmer expected offspring. These are based on chute scoring data, available for several breeds, and serve as a useful selection tool when buying bulls.
Using Docility EPDs
| EPD Value | Interpretation |
|---|---|
| High positive | Calmer than average |
| Near zero | Average for breed |
| Negative | More excitable than average |
Managing Temperament Issues
Marginal Bulls (Score 3)
Use the best facilities available, document all handling interactions, reassess periodically, and have a plan in place if behavior deteriorates.
Problem Bulls (Score 4-5)
The best option is to cull. If the bull has valuable genetics, use him only with extreme caution and never with inexperienced people. Document why the bull is being kept and set a timeline for culling.
Dangerous Bulls (Score 6)
Cull immediately. Document the decision for your records and remove the animal from the premises as soon as possible. No genetic merit justifies keeping a score-6 bull.
Genetic Selection Strategies
Long-Term Temperament Improvement
Score every animal at every handling opportunity. Cull the poorest temperament animals, select replacements from the calmest parents, use bulls with Docility EPDs, and document progress over generations.
Expected Progress
With consistent selection, expect noticeable improvement in 2-3 generations. You will see gradual reduction in handling time, fewer injuries to cattle and handlers, and improved overall productivity. The process is self-reinforcing because calm cattle are easier to keep calm, which means less stress and better performance across the board.
Related Resources
- Bull Handling Safety Essentials
- Managing Aggressive Bulls
- Introducing New Bulls
- Low-Stress Cattle Handling Principles
Bottom Line
Temperament is heritable, and selection works over generations. Aim for scores of 1-2 only, and do not compromise on temperament for the sake of other traits. Never trust any bull regardless of temperament score, because even calm bulls are dangerous animals. Hand-raised bulls are a particular risk, so avoid creating them. Use Docility EPDs as a selection tool when buying bulls, and cull problem animals every generation. Good handling matters too: proper facilities and low-stress techniques let an animal's genetic potential for calmness actually express itself.
At the end of the day, temperament is one of the most important traits in a herd bull. No amount of growth, carcass merit, or maternal value justifies keeping a bull that puts people at risk. Make disposition a non-negotiable part of every selection decision.
