They get to swim every day
We do have two boys and 4 girls, but they are seperated indoors and they haven't mated yet - the boys still haven't tried to mate properly with the girls, even though they are a year older than them!
UPDATE: I tried the vaseline thing but I could not push it back in to stay in, so we called up a local vet who recommended us to a more specialist vet in a town about 40 mins away. We made an appointment and then had to rush out to buy a carry-case to take her in, as we've never needed to transport them other than bringing them home as babies! After spending around £80 on that, we drove home and put her in it and set off. She was actually pretty good about it.
When we saw the vet she did some feeling and poking around the vent area and said she thought it is not actually prolapse but maybe just swollen, so was going to prescribe antibiotics and anti-inflammatories, however she started feeling further up her body and said she felt a hard lump which didn't feel good and isn't normal. She suggested either:
1. Build-up of urates which she has been unable to pass
2. An egg which hadn't passed and had gone weird
3. A tumor
We agreed for her to stay overnight and then tomorrow to be put under general anaesthetic to have an x-ray done to see what we should do from there. With the first two she said surgery is an option, however if it is a tumor, surgery is possible but she said if that was the case they would advise euthanasia.
The consultation alone was £39! With the added anaesthetic and x-ray it will total around £160, then further surgery if we decide on that could apparently be maybe £200 on top of that! We're very worried but I'm willing to pay if it is worth it. We're all just hoping it's fixable and that she'll be okay