Rodent Baits

How to Choose the Right Rodent Bait for Your Situation

The level of rodent activity at your property should drive every decision you make about rodent bait selection. A light, occasional mouse sighting calls for a different approach than a heavy rat infestation in a commercial kitchen. Before purchasing, assess three things: the type of rodent (rat vs. mouse), the severity of activity (light, heavy, or ongoing), and the environment where you'll be placing bait (indoors, outdoors, wet areas, or locations with competing food sources).

For heavy infestations or areas with significant food competition, we recommend second-generation anticoagulant rodenticide baits. These single-feed formulations require only one feeding for a lethal dose, making them effective even when rodents have plenty of other food options. For lighter activity or long-term monitoring and maintenance, first-generation anticoagulant or non-anticoagulant rodenticide products may be the better fit. Our rodenticide comparison chart breaks down every product we carry by active ingredient, feed type, and recommended use case.

Rodent Bait Forms: Blocks, Pellets, Soft Baits, and Place Packs

Rodent baits come in several physical forms, and each has specific advantages depending on where and how you plan to use them.

Block and blox baits are the most versatile option. They hold up in both wet and dry conditions, making them suitable for indoor and outdoor use. Most blocks feature a center hole that allows you to secure them on the rod inside a tamper-resistant bait station, which prevents rodents from carrying bait away and keeps it out of reach of children and pets. Block baits have become the standard in commercial pest management for this reason.

Pellet baits resemble food particles that rodents readily pick up and consume. They are available in bulk pails or preportioned placepacks. Place packs are especially convenient because they allow for easy monitoring; you can tell rodents have been feeding when the pack has been gnawed open. However, loose pellets can be carried off and hoarded, so secured placement is important.

Soft baits have become increasingly popular among pest control professionals in recent years. Their fat- and oil-based formulations offer exceptional palatability, and rodents will often choose soft bait over competing food sources in the environment. Soft baits do not contain wax, which eliminates bait aversion that some rodents develop with traditional block formulations. Keep in mind that soft baits are non-weatherproof and perform best indoors or in protected, dry locations.

Meal baits offer high acceptance but spoil quickly in humid conditions. Like pellets, they work best in dry, indoor environments.

Anticoagulant vs. Non-Anticoagulant Rodenticide Baits

Understanding the difference between anticoagulant and non-anticoagulant rodent baits is essential for choosing the right product and managing risk.

Anticoagulant rodenticide baits work by disrupting normal blood clotting, which leads to delayed internal bleeding. Because the effect is gradual, rodents do not associate the bait with illness and will continue feeding without developing bait shyness. This category is further divided into first-generation and second-generation anticoagulants.

First-generation anticoagulants, such as those containing diphacinone, are multiple-feed rodent baits. Rodents must consume the bait over several consecutive days (typically 3 to 10 days for rats and longer for mice) to reach a lethal dose. These rodenticide products carry a lower risk of secondary poisoning because no single feeding contains enough active ingredient to harm a predator that consumes a poisoned rodent. First-generation baits are best for ongoing maintenance programs and can be sold in any package size.

Second-generation anticoagulants contain active ingredients like bromadiolone and brodifacoum, along with difethialone. These are single-feed rodenticide baits, meaning one dose is lethal. They are our first recommendation for heavy infestations, persistent rodent problems, and situations where rodents have become resistant to first-generation products. Per current EPA regulations, second-generation anticoagulant baits must be sold in quantities of 16 pounds or more for the professional market. The treatment for accidental anticoagulant poisoning in pets is Vitamin K1, which is readily available through veterinarians.

Non-anticoagulant rodent baits work differently than anticoagulants. Bromethalin is a neurotoxin; cholecalciferol (vitamin D3) disrupts calcium balance (leading to dangerously high calcium levels); and zinc phosphide produces toxic gas in the stomach that can cause rapid organ failure. The non-anticoagulant products we carry are single-feed/single-dose formulations.

A key consideration: there is no specific antidote for most non-anticoagulant rodenticide exposures. Veterinary and medical teams may be able to provide supportive care and treatment protocols depending on the active ingredient and how quickly exposure is identified, but outcomes can be time-sensitive. Because of this, strict placement practices and the use of tamper-resistant bait stations are especially critical when deploying these products.

One benefit: compared to second-generation anticoagulants, non-anticoagulant baits generally present a lower risk of secondary poisoning in predators and scavengers. As always, confirm allowable products and use requirements with your state’s current regulations, as restrictions vary by location and continue to change.

Safe Use of Rodent Bait: Bait Stations and EPA Requirements

We always recommend using tamper-resistant bait stations with any rodent bait product. Bait stations protect bait from weather, dirt, and insects while keeping it away from children, pets, and non-target wildlife. Under EPA rodent bait regulations, tamper-resistant bait stations are legally required for all outdoor, above-ground rodenticide placements.

For the professional applicator market, second-generation anticoagulant products must contain at least 16 pounds of bait, and bait stations are required for outdoor above-ground placements and for any indoor placement where children, pets, or nontarget animals could access the bait. All outdoor above-ground bait must also be applied within 100 feet of structures.

Proper bait station placement matters as much as product selection. Position stations along walls, near entry points, and in areas with visible signs of rodent activity such as droppings, gnaw marks, or grease trails. Check stations frequently, especially during the first week. Rats can consume an ounce or more of bait per night, so keeping stations full is critical to maintaining control. Replace bait that becomes insect-infested, moldy, or stale.

Contrac Blox Rodent Bait

Contrac Blox is used for rats and mice and has been the most consistent rodent bait over the years. Rodents love it, but dogs love it as well, so make sure to use a tamper-resistant bait station.