I'm going through something similar right now...I spent £450 in vet fees for Kiwi who died last month. Yes it's a lot but vets don't charge any less because the pet is "just" a guinea pig...they didn't know what was wrong and that meant lots of visits and meds, and then surgery...there was no point at which to reasonably stop treatment. I'm not working right now and I would normally ask my Dad for help (who used to have a guinea pig as a child and dotes on my daughter) but he is in a home now and his bank look after his finances, so I asked the people in charge of his money and for the first time they declined my request for help! I am so upset...it's not just about being declined but it feels like someone has done something nasty towards Kiwi...she was such a lovely, gentle soul and I'm so upset that anyone would think she wasn't worth trying to save. I have asked for an explanation.