I think the best thing to do, is to just get your phonebook out, and call the vets in your area and ask if they have payment plans, if you don't already have a vet! All vets are different! Some accept payments and some don't. Just explain your situation to the vet and they may be able to help you. You can also call The Humane Society in your area. They have low cost vets, that may be able to help your moms dog. I hope the dog is better soon and that everything works out. Good Luck!