Hello,
Has your vet told you if they are Struvite and ammonium urate stones or Calcium oxalate stones
Walter
These types of stones can be treated with dietary changes, antibiotic and increased fluid intake, the problem is if they are very large they may not dissolve quickly enough and could cause more problems.
Here is a link with information on the types of diets that should be used: Please Click Here
Since you are wanting to breed her again, and the stones have gotten worse not better over time to be honest I do not think a dietary change is going to be enough to dissolve these quickly enough.
I understand surgery is a concerning issue, but there is another option available and that work well with these types of stones.
Urohydropropulsion, is a procedure where the dog is anesthetized and a urinary catheter is placed. Through the catheter, the bladder is filled with sterile saline. The dog is then held in an upright position and, by hand, the veterinarian compresses the bladder, forcing the solution back out, and with it, the stones. Depending on the size of the stones this may be the best and most effective choice for your girl.
Though the stones may be to large for this procedure, if that is the case then surgery is really the best option. The fact is if the stones are to large or Urohydropropulsion then dietary changes likely are not going to work either thus limiting your choices to surgery.
They may be to large, but I would speak with your vet just in case. If they are to large though then surgery is your best option.
I wish you the best with this, if you need anything please let me know. If you are satisfied with my answer please don't forget to click the accept button so I receive credit.
Thanks!
Breeder
Breeder and pet health consultant. Have spent a number of years with dog rescue, training and health