Hi and welcome!
I am very sorry about about your diagnosis. Thankfully bladder stones in sows is generally a rather straight forward operation with very good recovery chances. The price for the operation is at the higher end, but it is always a bit of a weigh up between using a piggy savvy specialist or a cheap general vet, and the amount of experience and post-operative care you get.
We have got a piggy savvy vet locator on the top bar for our UK members; it includes both specialist and general vets.
Please make sure that you have got recovery food and probiotics at home in case the operation recovery is not as smooth as wished. Weigh any freshly operated piggy once daily at the same time in the feeding cycle. Also ask your vet how soon after an operation your girl can have painkillers in case you need to see an emergency vet. See your vet or an out-of-hours vet if your girl is lethargic, quite obviously in pain or doesn't eat at all within a day of the operation. It takes about 2-3 days after a major operation for the body to settle down and start healing. The scars should knit within 10-14 days and your girl should be brighter and happier in herself with every passing day.
All information for syringe feeding and supportive products can be found in this link here:
https://www.theguineapigforum.co.uk/threads/complete-syringe-feeding-guide.115359/
For the long term care, we recommend to look at the following issues:
- using cystease (bladder coating glucosamine cat food supplement) or vegetarian glucosamine to help protect the bladder walls
- filter your water, especially in a hard water area
- switch to a low calcium diet, like the IC diet that we recommend under "daily veg" in our regular diet thread or look at more low calcium diet info in order to minimise the risk of a return of bladder stones.
https://www.theguineapigforum.co.uk...or-a-balanced-general-guinea-pig-diet.116460/
https://www.theguineapigforum.co.uk/threads/low-calcium-diet-for-bladder-piggies.105930/
- Switch to low calcium pellets like these (5 pellets per piggy per day):
http://www.zooplus.co.uk/shop/small_pets/food/guinea_pig/bunny/195679
Not all factors of the complicated calcium absorption process can be necessarily controlled by diet, but it can go a long way.
As we have got members from all over the world, we find it very helpful if you please added your country or county to your details, so we can always tailor any advice to what is available where you are. As you can imagine, our advice especially with brands etc. can vary a lot. Click on your username on the top bar, then go to personal details and scroll down to location.
Please keep all questions and updates to this thread so we can refer back to what has gone on before and tailor any advice to what is best for you and your girl.