Written by the Nuvirox Research Team
Key points
- A survey of 303 veterinary house officers across 9 institutions found average sleep dropped from 7.5 hours to 6 hours on nights working in the clinic, with 40% reporting loss of empathy tied to fatigue.
- On-call veterinary work has been linked to psychomotor impairment comparable to blood alcohol levels of 0.04-0.05% after extended shifts, echoing findings in human medical residents.
- The honest catch: on-call disruption isn't just about hours slept — anticipatory stress before a shift can degrade sleep quality even on nights you aren't actually called in.
Short answer: yes, being a veterinarian or working on-call in animal care carries a well-documented sleep cost, and the research draws directly on decades of parallel findings in human medicine residency training. This isn't a niche complaint; it's an occupational health pattern that's been formally studied, with real implications for clinical judgment, empathy, and long-term wellbeing in the field.
What does on-call veterinary work actually do to sleep?
A cross-sectional survey of veterinary house officers (interns and residents) at nine AVMA-accredited teaching hospitals found respondents slept an average of 6 hours per night when working in the clinic, compared to 7.5 hours on nights they weren't working — a 1.5-hour nightly deficit concentrated during exactly the periods when clinical judgment matters most. The same study found that 40% of respondents reported a loss of empathy that they linked to fatigue, and that most were working 11-13 hour days, 5-7 days per week, well beyond a standard workweek.
On-call duty specifically (being available to be summoned back into work) carries its own distinct burden separate from scheduled long shifts. Research on veterinary professionals working on-call emergency shifts found significant differences in cognitive function, motor skills, and reaction time between those who lost little sleep on-call versus those who lost substantial sleep, using standardized cognitive and motor testing batteries after every night shift over a four-week period.
Why does on-call work disrupt sleep even on 'quiet' nights?
The disruption isn't only about time actually spent awake handling emergencies. Anticipatory stress — the knowledge that a phone call could come at any moment — has been shown in broader on-call research (including studies of physicians) to fragment sleep architecture even when the call never comes, likely through sustained low-level activation of the body's stress response. Veterinary-specific research examining job satisfaction and wellbeing found on-call duties associated with lower mood, increased stress, and strain on personal relationships, largely mediated through this sleep disruption pathway.
This mirrors a well-established finding from human medical residency research: studies of medical residents working extended or on-call shifts have found psychomotor impairment after heavy night call comparable to blood alcohol concentrations in the 0.04-0.05% range, and veterinary researchers have explicitly drawn on this parallel literature when studying their own field, since the underlying physiology of sleep deprivation doesn't differ between professions.
What actually helps
Practice-level changes tend to matter more than individual willpower here: rotating on-call responsibility across a larger pool of staff, building in mandatory post-call rest periods before the next scheduled shift, and using a triage system to filter which calls genuinely require an immediate response versus what can wait until morning have all been suggested by researchers studying veterinary and physician on-call burden. On an individual level, protecting a consistent wind-down routine on nights you're on-call (even if disrupted), and prioritizing catch-up sleep on the days immediately following an on-call stretch — similar strategies to those recommended for other shift-work schedules — are the most evidence-aligned personal strategies available.
How this compares to human medicine's response
It's worth noting that human medical residency training has, over the past two decades, undergone significant regulatory reform specifically because of this research — the Accreditation Council for Graduate Medical Education in the U.S. has imposed formal duty-hour limits on physician trainees partly in response to studies showing the same psychomotor impairment and patient-safety risks described above. Veterinary medicine, as a field, has generally lagged behind in adopting comparable formal limits on trainee and on-call hours, which is part of why researchers studying veterinary house officers have explicitly framed their findings as a call to apply lessons already learned in human medicine. This isn't a criticism unique to veterinary practices; it reflects a broader pattern where safety-critical professions often adopt sleep-science-informed scheduling reforms slower than the underlying research would support.
What this research doesn't fix
None of this research offers a way to eliminate the fundamental need for after-hours emergency veterinary coverage, and no individual sleep strategy will fully offset a genuinely demanding on-call schedule — a pattern also documented among other on-demand, schedule-unpredictable occupations. If fatigue is affecting your clinical decision-making or driving safety, that's a patient-safety and workplace-policy issue worth raising directly with practice leadership, not just a personal sleep hygiene project.
Frequently asked questions
Is this just a veterinary problem, or does it affect other on-call professions?
The underlying sleep-disruption pattern is well-documented across on-call professions generally, including physicians and nurses. Veterinary-specific research has explicitly drawn on and confirmed findings from the broader medical on-call literature.
Does being 'used to it' reduce the impact over a career?
Research on medical residents and other on-call workers generally does not support meaningful long-term adaptation to chronic sleep restriction; performance impairments tend to persist even in experienced workers, though people may become less consciously aware of their own impairment over time.
What's the single most effective fix?
Reducing on-call frequency per individual (by expanding the on-call pool) and protecting recovery sleep after a call shift are the two changes with the most consistent support across this research, more than any individual sleep hygiene tactic.
Can supplements help with occasional on-call sleep disruption?
A sleep-support supplement may help you fall back asleep more easily after a disrupted on-call night, but it won't offset the cumulative effects of chronic sleep restriction if the underlying schedule doesn't change.
Are veterinary technicians and support staff affected the same way?
Most of the formal research to date has focused on veterinarians and house officers (interns/residents) specifically, but the on-call and shift-work mechanisms described here are not unique to any one role, and support staff working comparable overnight or on-call schedules would be expected to face similar sleep disruption based on the broader shift-work literature.
FROM NUVIROX
Why we formulated Sleep+ Restore
For the nights when you're back in bed after a call but your mind is still running, Sleep+ Restore's blend of melatonin, GABA, and L-theanine is designed to support falling back asleep — not a fix for a demanding on-call schedule, but a reasonable tool for the disrupted nights it creates.
Learn more about Sleep+ Restore →The bottom line
On-call and shift-based veterinary work carries a real, measured sleep cost, closely paralleling decades of research on physicians in similar roles. The fix that actually moves the needle is structural — spreading on-call load and protecting recovery time — more than any individual habit, though protecting your own wind-down routine still helps on the margins. If you're in this field and recognize the pattern described here, that's worth raising as a practice-level conversation with leadership, not just something to individually push through on your own.
References
- On-Call Duties: The Perceived Impact on Veterinarians' Job Satisfaction, Well-Being and Personal Relationships. Frontiers in Veterinary Science. 2021;8:740852.
- Sleep patterns, fatigue, and working hours among veterinary house officers: a cross-sectional survey study (n=303, 9 institutions). Journal of the American Veterinary Medical Association. 2022;260(11).
- The impact of 'sleeping night shifts' on veterinary clinical staff's cognitive performance and fine motor skills. University of Bristol research, British Veterinary Nursing Association, 2024.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.