
Diet plays a crucial role in dissolving struvite bladder stones, which are the most common type of feline stones. Therapeutic diets for struvite dissolution aim to limit calculogenic compounds like phosphorus and magnesium while acidifying urine. This makes the urine less conducive to stone formation and helps dissolve existing stones. The length of treatment varies depending on the size and number of stones, with dissolution typically occurring within one to three weeks in cats and two weeks to two months in dogs. Prescription diets are essential for preventing recurrence, especially in cats prone to struvite bladder stone formation.
| Characteristics | Values |
|---|---|
| Time taken to dissolve struvite stones | 1 to 3 weeks, up to 1-2 months |
| Dietary requirements | Only prescription food, no treats or other food |
| X-rays | Every few weeks to monitor progress |
| Antibiotics | Required if a urinary tract infection is diagnosed |
| Recurrence | Likely unless conditions that led to stone formation are corrected |
| Prevention | Prescription diet to create an unfavourable environment for stone formation |
| Dietary dissolution | Effective and inexpensive |
| Therapeutic diets | Limit calculogenic compounds and acidify urine |
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What You'll Learn

Diet compliance is key to dissolving struvite stones
Diet plays a crucial role in dissolving struvite stones and preventing their recurrence. Therapeutic diets for struvite dissolution aim to limit calculogenic compounds, such as phosphorus and magnesium, and acidify urine. By altering the pH and chemical composition of urine, these diets make it harder for struvite stones to form and dissolve existing stones.
Compliance with the prescribed diet is essential for effective dissolution. Cats with struvite bladder stones must eat only the prescribed food, with no treats or other food given alongside it. The diet must be followed consistently to ensure the stones shrink and eventually dissolve. X-rays or radiographs are taken every few weeks to monitor progress and ensure the treatment's effectiveness.
The length of the therapeutic diet depends on the size and number of stones. In most cases, struvite stones in cats can dissolve within one to three weeks, although some may take up to one to two months. It is recommended to continue the diet for at least 30 days after the stones are no longer visible on radiographs to prevent recurrence.
For dogs, a struvite dissolution diet is typically short-term and accompanied by the treatment of any underlying urinary tract infections. It is important to note that leaving dogs on a struvite dissolution diet after the stones have dissolved may be unnecessary and could be a management mistake.
Overall, dietary dissolution of struvite stones is an effective, inexpensive, and innovative treatment option that replaces painful and expensive surgical removal. Compliance with the prescribed diet is key to successfully dissolving struvite stones and preventing their recurrence.
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Therapeutic foods can be 100% effective in 1-3 weeks
Therapeutic diets are an innovative and inexpensive way to dissolve struvite stones, replacing expensive and painful surgical removal. Dietary dissolution of struvite stones is achieved by limiting calculogenic compounds such as phosphorus and magnesium and acidifying urine. This makes the urine less welcoming for stone formation and helps dissolve existing stones.
Therapeutic diets are available in canned and dry varieties. Canned food is preferable for stone prevention due to its high moisture content, which dilutes the urine. Dry food can be moistened with water or broth to increase water intake. Feeding a therapeutic diet to cats and dogs can be challenging, and it is recommended to transition gradually to the new food. Owners can offer half the daily ration of the familiar food and half of the new food in separate containers, gradually reducing the amount of familiar food over several days.
Compliance with the therapeutic diet is critical for rapid success. Sterile struvite urocystoliths typically dissolve over two to five weeks, with some cases reporting dissolution in as little as one to two weeks. It is recommended to continue the diet for at least 30 days after uroliths are no longer visible radiographically to prevent recurrence.
While therapeutic diets are effective, it is important to monitor the pet's health. Dietary dissolution may not be effective if a urinary tract infection (UTI) is present or if the pet is fed anything in addition to the dissolution diet. UTIs must be appropriately treated, and dietary changes must be made to prevent recurrence.
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Antibiotics are needed if a UTI is present
Struvite uroliths are common in cats and can be dissolved through a therapeutic diet in as little as one to three weeks. However, this diet should be continued for at least 30 days after the uroliths are no longer visible radiographically to prevent recurrence.
Regarding urinary tract infections (UTIs), it's important to consult a healthcare provider for proper diagnosis and treatment. UTIs are bacterial infections of the urinary system, typically causing problems with urination and pain in the side. Most UTIs can be effectively treated with antibiotics, and it's crucial to follow the prescribed directions and complete the full course of medication. Antibiotics may not always be necessary, as some minor UTIs can resolve on their own, and alternative treatments such as increased fluid intake or intravenous (IV) treatment may be suggested in certain cases.
For uncomplicated UTIs, a short course of oral antibiotics is usually recommended. First-line treatment options include nitrofurantoin, fosfomycin, and sulfamethoxazole-trimethoprim. It's important to note that symptoms like burning and stinging during urination typically improve within a day of starting antibiotic treatment. However, if symptoms persist after 2-3 days, it's advisable to contact a healthcare provider.
In more complicated cases, a urine culture may be ordered to identify the specific bacteria causing the UTI. This information guides the selection of the most appropriate antibiotic. If a UTI is left untreated or inadequately treated, it can lead to more severe issues, including kidney infections. Therefore, it's essential to seek medical attention and adhere to the prescribed treatment plan.
Additionally, it's worth mentioning that antibiotics can have side effects, such as stomach upset, nausea, vomiting, and antibiotic-associated diarrhea. It is recommended to take antibiotics with a snack or meal to mitigate stomach issues unless an empty stomach is medically required. Furthermore, it is crucial to never share antibiotics with others, as they can be harmful if not specifically prescribed for an individual.
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Dissolution time varies with each animal
The dissolution time for struvite stones varies across different animals. Cats, for instance, can metabolically produce struvite in the absence of a urinary tract infection. Therapeutic diets for cats typically take around one to three weeks to dissolve struvite stones. However, it is recommended that the diet be continued for at least 30 days after the stones are no longer visible via radiography. In some cases, feline struvite stones have been observed to dissolve in as little as seven days.
Dogs also respond well to therapeutic diets for struvite dissolution. The length of treatment depends on the size and number of stones, with smaller stones often dissolving within two to three weeks, while larger or more numerous stones may take two to three months.
It is important to note that dietary dissolution of struvite stones is most effective when the animal adheres strictly to the prescribed diet. No treats or other food items should be given during this period. Additionally, it is crucial to address any underlying urinary tract infections with antibiotic therapy while the diet works to dissolve the struvite stones.
While dietary dissolution is a successful and cost-effective treatment for many animals, surgical removal of struvite stones may be necessary in certain cases where dietary treatment is ineffective or impractical.
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Recurrence is common, so monitor urine
Struvite bladder stones, also known as uroliths, are a common occurrence in cats and dogs, and less commonly, humans. They are rock-like formations of minerals that develop in the urinary bladder and can cause severe health issues if left untreated.
Diet plays a crucial role in struvite dissolution and prevention. Therapeutic diets for cats and dogs aim to limit calculogenic compounds such as phosphorus and magnesium, and increase water intake, making the urine less favourable for stone formation and aiding in dissolving existing stones. In cats, these diets are highly effective, with some stones dissolving in as little as one week, and most within one to two months. For dogs, the dissolution process can take anywhere from two weeks to two months, depending on the size and number of stones.
However, recurrence is common, especially in cats, so it is important to monitor urine regularly. After switching to a therapeutic diet, it is recommended to re-radiograph cats every two to four weeks to monitor the dissolution of the stones. For dogs, the recurrence of struvite stones is often linked to urinary tract infections (UTIs), so frequent monitoring of urine samples is necessary to prevent recurrence.
Additionally, for cats, it is recommended to monitor the cat's urine a month after switching to a different diet. This may involve performing X-rays or urine cultures to ensure that the stones are shrinking and that the urine characteristics remain within desired parameters. In some cases, cystotomy or cystoscopy may be required to surgically remove the stones if they do not dissolve or if there is a risk of urinary tract obstruction.
Overall, the key to preventing recurrence of struvite bladder stones is a combination of dietary changes, increased water intake, and vigilant monitoring of urine through regular re-checks and urine cultures.
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Frequently asked questions
Struvite bladder stones in cats typically dissolve in around one to three weeks, although this can take up to one to two months.
The prescription diet for struvite dissolution limits calculogenic compounds such as phosphorus and magnesium and acidifies urine. This makes the urine less welcoming for stone formation and helps dissolve existing stones.
X-rays or radiographs are taken every few weeks to monitor progress and ensure the stones are shrinking.
Yes, if a urinary tract infection is also present, antibiotic therapy is often required alongside the prescription diet.











































