When you discover signs of rodents at home, the first instinct is often to head to a DIY shop to buy anti-rodent products. Yet this seemingly simple approach carries serious risks to your health and that of your loved ones, your pets and the environment. Here is why it is better to entrust rodent control to a qualified professional.
The rat poisons available over the counter contain anticoagulant active substances that are potentially dangerous to humans. Even if the concentrations are lower than those of professional products, handling them without suitable protection exposes the user to real risks. Repeated skin contact with these substances can cause allergic reactions. Inhaling dust while setting out the baits can irritate the respiratory tract. In the event of accidental ingestion, anticoagulants disrupt blood clotting and can cause internal bleeding requiring urgent medical attention. Professionals, who are trained and equipped, handle these substances with gloves, masks and strict protocols that minimise any risk of exposure.
Anti-rodent products sold to the general public often come in the form of blocks, grains or coloured pastes that can attract the curiosity of young children and pets. In France, poison control centres receive several thousand calls every year related to the accidental ingestion of rat poisons by children or pets. Dogs are particularly at risk because the baits are formulated to be palatable. Even moderate ingestion can cause fatal internal bleeding in a pet if it is not treated quickly by a vet. The secured bait stations used by professionals are locked and designed to prevent any access by non-target species.
One of the least-known risks of anti-rodent products is secondary poisoning. When a rat or a mouse eats a rat poison, the toxic substance builds up in its body. If this poisoned rodent is then caught and eaten by a bird of prey, a cat, a fox or any other predator, the poison is passed on to the animal that ate it. This bioaccumulation phenomenon has devastating consequences for wildlife. Studies have shown the presence of anticoagulant rodenticides in the livers of more than 70 per cent of the birds of prey analysed in Europe. Professionals take this risk into account by using the minimum effective doses, collecting rodent carcasses and favouring mechanical methods where the context allows.
Beyond the risks, over-the-counter anti-rodent products are often not very effective at treating a genuine infestation. Their concentration of active substance is deliberately reduced for safety reasons, which makes them inadequate against an established rodent population. What is more, rats are extremely wary animals. The brown rat, the most common species in urban areas, is neophobic: it systematically avoids anything new in its environment for several days. If one of its fellow rats dies after eating a bait, the others learn to avoid it. Without knowledge of rodent biology and behaviour, baits are rarely placed optimally, which further reduces the effectiveness of the treatment.
The massive, uncontrolled use of first-generation rat poisons has encouraged the emergence of rodent populations that are resistant to anticoagulants. This phenomenon, scientifically documented for several decades, is particularly marked in Île-de-France and in large urban areas. Rodents carrying this genetic resistance survive eating standard rat poisons and pass this resistance on to their offspring. A professional knows how to identify the signs of resistance and adapt the protocol accordingly, by using second-generation molecules or by combining chemical methods with mechanical techniques.
A certified technician always starts with a full assessment of the situation. They identify the species present, assess the extent of the infestation, and locate the entry points and activity areas. On this basis, they draw up a suitable treatment plan that combines the most appropriate methods: mechanical traps, secured bait stations, exclusion of entry points and sanitation recommendations. The products used are regulated biocides, handled in accordance with current standards. Post-treatment follow-up is used to check the effectiveness of the measures and adjust the protocol if necessary.
Don't take unnecessary risks with products whose dangers you cannot control. At Mr Nuisibles, our technicians hold Certibiocide certification and are trained in the latest responsible rodent control techniques. We work in Île-de-France to provide a free assessment and safe treatment that respects your family, your pets and the environment. Contact us on 01 89 70 79 30 for a professional, lasting solution.
