Managing stress and heatstroke in rabbits
Why is managing stress and heatstroke a major challenge?
Rabbits: a species that is particularly vulnerable to heat
Managing stress and preventing heatstroke are now critical issues in rabbit farming. Rabbits are particularly sensitive to environmental changes, and even more so to heat. Unlike other species, they do not sweat and breathe exclusively through their nostrils. Heat dissipation therefore relies on two main mechanisms:
- latent heat, via increased respiratory rate;
- sensitive heat, particularly through their highly vascularized ears.
When heat impacts rabbit farm performance
Heat stress can occur from 25 °C indoors. This condition can be defined as the body’s inability to maintain a normal temperature to ensure standard metabolic and physiological functions. The effects of heat stress reveal themselves quickly: reduced feed intake, slowed growth, decreased feed efficiency, impaired reproductive performance, and a general weakening of overall health. If these conditions persist or intensify, they can lead to significant economic losses.
With climate change, these episodes are becoming more frequent across all production areas. The impacts of heat stress extend well beyond the summer season: a rabbit that has experienced even a brief episode of heat stress often exhibits stunted growth until slaughter. Does’ post-summer reproductive performance is also often affected.
In addition to these thermal stresses, there are other challenges that can, in some cases, be likened to a form of stress for the animal—vaccinations, handling, and dietary transitions—which place heavy demands on the metabolism and the immune system.
For farmers, feed manufacturers, and distributors, stress management is a strategic lever in terms of ensuring performance, limiting losses, and enhancing the sustainability of livestock operations.
Supporting hydration and electrolyte balance with Hydrafirst
Water is the essential nutrient when dealing with heat stress. Even moderate dehydration impairs growth and feed efficiency. To address this issue, Mixscience has developed Hydrafirst, a solution enriched with electrolytes and specifically formulated to support animals during periods of heat.
Hydrafirst stimulates animal rehydration by improving water retention in the body and helps compensate for electrolyte loss associated with hyperventilation. Its effectiveness was demonstrated in a zootechnical trial conducted between 65 and 71 days of age under summer conditions. During this period, the maximum temperature exceeded 25°C for three consecutive days.
Rabbits that received Hydrafirst three days before and then during the heat episode had an ADG of 37 g/day, compared to 33.4 g/day for the control group, representing a gain of +3.6 g/day. These results clearly illustrate the value of nutritional anticipation as a means of ensuring performance under summer conditions.
Limiting the consequences of stress through a targeted antioxidant approach
Thermal or physiological stress causes significant oxidative stress, which places heavy demands on the body’s reserves and weakens the immune system. To support animals in these delicate situations, we have developed Technovit C, a drinking water solution enriched with vitamin C.
Thanks to its antioxidant action, Technovit C helps reduce the effects of stress, particularly during critical periods such as heat waves or vaccination phases. By supporting natural defense mechanisms, Technovit C helps maintain growth, viability, and feed efficiency, while contributing to a sustainable management approach
Technical support and farm audits
Beyond nutritional solutions, our added value draws on recognized expertise in the field. As a European leader with a presence in many countries, we support our partners in a wide range of production contexts. Our technical teams work directly on the rabbit farms to adapt nutritional strategies and farming practices to local conditions.
In particular, we carry out technical audits and ventilation assessments to identify areas for improvement and implement concrete measures to prevent stress and manage heat stress episodes more effectively.
This comprehensive approach—combining nutrition, on-site expertise, and diagnostic tools—enables us to plan for high-risk periods, reduce the impact of stress on growth and feed efficiency, and ensure sustainable, controlled, and repeatable performance, both technically and economically.
Anticipating and managing stress for sustainable and competitive rabbit farms
Managing stress and preventing heat stress is now key to ensuring the successful performance of rabbit farms. Thanks to our expertise in nutrition, our innovative drinking water solutions, and our on-site support, we help industry stakeholders maintain animal health, optimize performance, and ensure farm profitability. By managing stress, rabbit farmers are also investing in the sustainability and competitiveness of rabbit production.
