Ryan needs help with her feet

Hello everyone. I am fundraising for my 7 year old grandson's dog Ryan. She is about 4 years old and is a rescue. We did not know about her feet when we got her because the shelter had already cleaned them up. We have had them cleaned up 4 times since then, in just over 2 years, The cleaning involves anesthesia and cutting off the growth on her pads and trimming the nails. The picture is the growth in 6 months. Besides the problems this causes with her walking, it is also painful for her. She is needing another cleaning, but also a biopsy to find a treatment because traditional treatments do not work. Anything you can donate will help. Thank you and God bless.