7 year old sheltie and we were told yesterday she has cancer on the leg which she can’t even put weight on. We have two choices which is remove the front leg (no guarantee cancer will be gone) or maintain somewhat of a quality of life for her. Wife is leaning towards the surgery and I am leaning towards making a tough call to end her pain when it gets worse. This dog loves to run and I could not bare to see her not doing what she loves and I do not want to keep her around for our sake. Any of you ever have a 3 legged dog and were they able to adjust to that? Thanks