£400 is VERY, VERY steep £200 is more the norm.
he will still cry a little while weeing for a few days.
first thing to do....
syringe feed him if he isnt eating or drinking a total of 120mls in 24hrs = you may have to do this until he is eating again so its poss you will have to take him with you when your away OR find someone willing to do this or he will die.
he needs some pain meds, ie metacam from the vets everyday for at least 4 days...
try to get as much water in him as possible this will help to flush the bladder out- the glass water bottles are better for bladder stone guineas as they tend to drink more with these type of bottles.
he will also need to go onto cystease for life which is a tablet used in cats but is SAFE in guinea pigs.
you can buy these off the Internet for around £20 for 100 tablets.
dosage is...
half a capsule dissolved into 1ml of water and give this via a 1 ml syringe.
save the other half for the next day and so on.
this helps to stop bladder stones forming.
he also needs a diet change...
so food like Kale
spinach,
broccoli.
cabbage,
parsley.
needs to be only given as treats every few weeks.
as these contain alot of calcium which causes bladder stones.
look for other foods that can be given that contain high vit c, ie peppers, and look on here (the forum) as lauraccc4 has a special diet for bladder stone guineas giving the calcium contain and other foods that can be given.
dont feed the muesli type of food as these are high in calcium, go for pellets but have a look on the Internet for low calcium dry foods for guinea pigs.
which antibiotics is he on?
he will also need probiotics which can be brought from pet shops he may not drink these via his water bottle so you can either add some to the mushed pellets or his veg if he is eating.
if he isnt eating its worth getting some vit c tablets- i use asda vit c for humans the chewable type and add half a tablet to the water bottle wait for it to dissolve and syringe feed this, so he is getting his vit c.
the best thing you can give is mushed pellets and poop from a healthy guinea pig all mixed together as it contains all the good stuff he needs until he is eating on his own.
and lastly there IS a risk 1-3 wks after a stone removal of it coming back.
i lost a guinea pig 3mths after the stone was removed
also keep him on white towels so you can see if he is weeing and the colour of it. it will be bloody coloured for a few days too x