Please Help Save My Best Friends Dog

On May 15th a horrible accident happened at my home. The dog that I was watching for my best friend who is away and unreachable till Sunday jumped from the roof of my building. The friend who brought him up there thought she was doing me a favor by letting him play when the accident happened. I have paid with the little savings I have to stabilize the animal but I don't have money to pay for the necessary surgery to save his life. He has a broken leg and internal bleeding among other tramas from the fall. I have 48 hours to raise $3,550 to pay for this treatment. The vet will not even run the necessary testing till we provide funding. I'm a single mother that was recently deeply affected by Hurricane Sandy, I don't have a savings to save my dear friends pet, I don't have any other options but to turn to the internet to help. Thank you for any support you can offer, it's a blessing.