
If your dog is experiencing skin or gut issues, an elimination diet can be a good way to determine whether they have a food allergy or intolerance. The best way to confirm an allergy is to do an elimination-challenge diet trial, which involves eliminating all possible allergens (typically proteins) from your dog's diet until their allergic response goes away. This is usually done for at least eight weeks, and you must be strict with the diet for the full duration. Once the allergic response has subsided, you can gradually reintroduce potential allergens, one at a time, to identify the specific foods that trigger your dog's allergies. It is important to note that an elimination diet should only be administered under the guidance of a veterinarian.
| Characteristics | Values |
|---|---|
| Purpose | Confirm a suspected food allergy or intolerance |
| Diet Composition | One protein and one carbohydrate source |
| Diet Type | Veterinary prescription, home-cooked, or hydrolyzed |
| Diet Duration | 8-16 weeks |
| Diet Introduction | Gradual over 5-7 days |
| Diet Strictness | No treats, medications, or supplements containing potential allergens |
| Monitoring | Track symptoms and progress |
| Reintroduction | Introduce one ingredient at a time and monitor for reactions |
| Outcome | Identify and eliminate problematic foods |
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What You'll Learn
- The elimination diet is a test to see if your dog is allergic to a specific food ingredient
- The diet should be fed for at least 8 weeks
- The food must be hypoallergenic and easily digestible
- The diet should be introduced gradually over a 5-7 day period
- The only way to determine a true food allergy is by performing an elimination diet trial

The elimination diet is a test to see if your dog is allergic to a specific food ingredient
Before starting the elimination diet, it is important to meet with your vet and decide on the two foods that will make up your dog's 50/50 diet. It is also crucial to introduce the new diet gradually over a five- to seven-day period to avoid any GI problems. Once the elimination diet is in place, it is important to be strict and not give your dog any treats or extras. If your dog gets better while on the elimination diet, you may choose to continue to the next step of the trial, known as the challenge.
The challenge step involves slowly reintroducing potential allergens, one at a time, and watching for an allergic response. This will allow you to identify the problem foods and avoid them in the future. It is important to note that the reintroduction of the allergen is the only way to confirm whether it is or isn't the issue. If your dog has a flare-up, then the reintroduced food is the cause of their symptoms. If they don't have a reaction, you can move on to the next suspected allergen.
It is important to remember that an elimination diet should only be administered under the guidance of a veterinarian. Additionally, it should not be continued long-term as it could lead to harmful nutritional deficiencies and imbalances. By being diligent and patient during the elimination diet and challenge steps, you can help your dog feel better and manage their food allergies effectively.
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The diet should be fed for at least 8 weeks
The elimination diet should be fed for at least eight weeks to ensure that any allergens are eliminated from the dog's system. During this time, it is crucial that dog owners remain strict and committed to the diet, feeding their dogs only the food recommended by their veterinarian. This means no treats, flavoured medications, or supplements unless approved as part of the diet.
The diet should be introduced gradually over a five- to seven-day period to avoid any gastrointestinal issues that may arise from a sudden change in diet. Dog owners should be aware that some dogs may need more time to adjust to the new diet, and it is normal for some dogs to refuse the new food initially.
While on the elimination diet, dog owners should monitor their dogs closely for any improvement in symptoms. Signs of improvement may be seen as early as the fifth week, especially in dogs with gastrointestinal issues like diarrhoea. However, it is important to continue the elimination diet for the full eight weeks to give the dog the best chance of responding.
After the eight-week period, dog owners may gradually reintroduce their dog's former foods one at a time. A return of symptoms indicates that the recently added food is likely a trigger. It is important to note that even the tiniest amount of an allergen can set off an allergic reaction, so dog owners should be vigilant during this reintroduction phase.
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The food must be hypoallergenic and easily digestible
An elimination diet trial is the only way to truly determine whether your dog has a food allergy. It involves removing all potential allergens from your dog's diet and then reintroducing them one at a time to observe any allergic reactions. This process helps identify specific ingredients that trigger allergic or intolerant responses, allowing for a tailored dietary plan for your dog.
The food provided during an elimination diet trial must be hypoallergenic and easily digestible. It should be something your dog enjoys eating and agrees with their digestive system. Each dog is unique, and you may need to experiment with a few different foods before finding the right one. It is imperative that no other food products or treats are given during the trial, as even the smallest amount of an allergen can affect the results.
The elimination diet should be introduced gradually over a five- to seven-day period. This gradual introduction is crucial, as some dogs may experience gastrointestinal issues if their diet is changed suddenly. Most dogs adapt well to the new diet, but some may need extra time to adjust. The trial typically lasts for at least eight to twelve weeks, and it is recommended to continue for at least one month after the resolution of any skin infections.
The food chosen for the elimination diet should be a novel protein source that your dog has not previously consumed. Common options include rabbit, venison, duck, kangaroo, and fish. It is important to ensure that these novel proteins are sourced from reliable suppliers to guarantee quality and safety. The protein source can be paired with a simple carbohydrate like sweet potato or rice, or a potentially hypoallergenic vegetable like squash or pumpkin to maintain fibre intake.
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The diet should be introduced gradually over a 5-7 day period
The elimination diet should be introduced to your dog gradually over a 5-7 day period. This is important because some dogs may experience gastrointestinal issues if their diet is changed suddenly. While most dogs adapt to the new diet well, some need time to adjust. If your dog does not adjust to the new diet within a week or two, or refuses multiple therapeutic diets, you can work with a veterinary nutritionist to formulate a home-cooked diet.
The elimination diet is typically fed for at least 8 weeks, although signs of improvement are often seen much sooner. Dogs with gastrointestinal issues like diarrhoea usually improve sooner than dogs with skin issues, but many dogs experience remission of symptoms by the fifth week. If your dog gets better while on the elimination diet, you may choose to continue to the next step of the trial (the challenge) or, if you are feeding an appropriate food for your dog, you may choose to stop the trial and continue feeding the elimination diet. If you stop the trial, remember that you have not confirmed that your dog has a food allergy.
The elimination diet is a test to see if your dog is allergic to a specific food ingredient. First, eliminate all possible allergens (typically proteins) from the diet until you see the allergic response go away. Then, you can reintroduce the possible allergens, one at a time, and watch for the allergic response to flare up again. Once you have identified the problem foods, you can avoid them, and your dog’s allergic reaction will typically settle down.
The diet should consist of a prescribed home-cooked or prescription therapeutic diet that contains a unique protein and carbohydrate source to which the dog has not previously been exposed. The most common novel protein diets include rabbit and potato, venison and potato, and kangaroo and oats. Many fish and lamb diets are no longer considered novel as these ingredients are more commonly used in over-the-counter diets.
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The only way to determine a true food allergy is by performing an elimination diet trial
The elimination diet trial is typically done for the diagnosis of a food intolerance or allergy, and it should only be done under the guidance of a veterinarian. The veterinarian will help determine if your dog has a condition, most commonly an allergy, for which an elimination diet is an appropriate diagnostic step. The diet will usually include one protein and one carbohydrate to provide sufficient energy while being less aggravating for the dog's immune system. The protein will likely be from an unusual source, as common proteins are often the source of the allergy.
During the elimination diet trial, it is imperative that the dog is only fed the prescribed diet, associated treats, and water. Even the tiniest amount of another food can affect the results of the trial. For example, the flavouring in a single monthly heartworm pill is enough to set off an allergy. It is also important to be aware of other potential allergens, such as toothpastes, medications, and supplements, as these often contain protein that may interfere with the trial.
After the elimination period, the next step is the challenge phase, where the suspected allergen is reintroduced in small amounts while monitoring for any signs of a reaction. If your dog has a flare-up, the reintroduced food is the cause of their symptoms and can be avoided in the future. If they don't have a reaction, you can move on to the next suspected allergen. With patience and communication with your vet, an elimination diet can be a powerful tool in diagnosing allergies.
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Frequently asked questions
An elimination diet is a process of eliminating the foods your dog typically eats and feeding them a restricted, "bland" diet for a period of time (usually several weeks) and then slowly reintroducing foods until the offending ingredient is found.
An elimination diet should be followed for at least 8 to 12 weeks, and a minimum of one month beyond the resolution of a skin infection. Some vets recommend a 16-week elimination diet.
If your dog is experiencing skin or gut issues on a regular basis, an elimination diet can help determine if your dog has a food allergy. Common symptoms include itchiness, redness, greasy skin, bloating, vomiting, or diarrhea.
During an elimination diet, your dog should be fed a diet with one protein and one carbohydrate source to which your dog has not previously been exposed. Common novel protein diets include rabbit and potato, venison and potato, and kangaroo and oats.
After an elimination diet, you can slowly start reintroducing potential allergens, one at a time, and watch for any allergic responses. Once you have identified the problem foods, you can avoid them, and your dog's allergic reactions should improve.










































