Medical treatment for my dog Rufus

Our five year old great-dane Rufus may have bone cancer in his back paw. He is in constant pain and he cannot use the paw to get up on the couch. 

We need $200 for an X-Ray; we will keep you informed as to his condition, we have no way of paying for an X-Ray. I am a senior citizen, retired living on $600 a month. 

Just asking for your kindness, not for us, but for a beautiful animal in pain. 

Thank you for your generosity, I can't stand to see this dog in pain. We are hoping at worse that it's a broken bone.