My dog was diagnosed with bone cancer and the vet says maybe she has six months. She is on pain meds (Tramadol) and seems to be comfortable for the time being. Some days she is listless and her eyes look like she might be in pain. She has a little trouble getting up from arthritis, but she does not have a limp.I want to know if anyone can tell me what signs i will see when she is starting to experience pain or when it is getting near the time to put her down. We will not let her suffer but we want to keep her as long as she can be with us. Thank you in advance for your help.