The exact mechanism of cystine urolith formation is unknown.
Cystine stones in dogs diet.
For example for dogs with urate and cysteine bladder stones your vet will recommend specific lower protein therapeutic diets that promote alkaline ph and reduce intake of stone precursors says larsen who is board certified in veterinary nutrition.
In this situation measure urine cystine concentration.
While bladder stones in general are somewhat common in dogs cystine bladder stones are rare.
Some of us are also concerned about feeding ultra low protein diets to dogs particularly.
Without preventive care cystine uroliths tend to recur within 6 12 months of removal or dissolution.
Urolithiasis is a medical term referring to the presence of crystals or stones in the urinary tract.
Calcium oxalate stones cannot be dissolved and must be removed surgically.
Dogs affected by cystine stones i am assuming cystine as you didn t specify in your question but more information may be found about other stones on the link below may be given n 2 mercaptopropionyl glycine 2 mpg and a low protein alkalinizing diet to help raise the ph of the urine to prevent further urinary stone formation.
Because not all cystinuric dogs form stones cystinuria is a predisposing factor rather than a primary cause of urolith formation.
Once they are removed you can help prevent the formation of new stones by giving your dog the correct diet.
Cystine bladder stones appear to be the result of a genetic abnormality that prevents a dog from reabsorbing cystine from the kidneys.
In most stone free dogs cystine concentrations are extremely low.
When the stones are made up of cystine a normal compound found in the body they are called cystine stones.
Your veterinarian may be able to palpate the stones or may need to perform imaging studies such as a bladder ultrasound or a contrast radiographic study.
Urine amino acid profile reveals abnormal quantities of cystine and in some dogs and cats lysine arginine and ornithine.
Return for follow up examinations and tests as recommended by your veterinarian.
Urolithiasis cystine in dogs.
If the nitroprusside test was only evaluated after castration it is difficult to determine if castration reduced cystine excretion.
Strict compliance is necessary if your dog is on a special diet and is receiving medication to dissolve cystine stones.
The type of diet your vet prescribes will depend on the stone.
Lower protein to reduce.
On the canine cystinuria email list most of us have found that diet and urinary alkalinization have failed to prevent our dogs from forming stones and have sometimes caused other problems including other types of stones that form in alkaline urine.
This is significant as lifelong feeding of a commercial prescription diet or home prepared therapeutic diet is very expensive particularly in large breed dogs.