I faced a similar situation with my French Bulldog Boris a couple of years ago. He was 12 years old. I realized that his gums were suddenly very pale (a sign of anemia). My vet checked him over and suspected a mass on the spleen... an ultrasound confirmed that there was indeed a mass and it appeared to have spread to surrounding organs. He couldn't say with 100% certainty that it was malignant but we was almost certain that it was. He said with surgery, it would still probably only give him a few more months. I opted not to put him through a hard surgery and recovery and the vet told me that he wasn't in pain at that point and would probably drift away peacefully... but also told me what signs to look for if he took a sudden turn for the worse. I just didn't want him to go through additional pain that he wouldn't understand to buy him a few more months. Had he been younger and there was a guaranteed recovery and promise for a quality long life, I would have done more. I brought him home and spoiled him not knowing if he had days or months. The vet had me give him Yunnan Baiyao which is a chinese herbal supplement that helps with bleeding internally and got the anemia under control. I kept him on that for the rest of his life. He was also on other meds for other pre-existing conditions.
He managed to surprise us all and lived almost two years longer. We just lost him this last February. So it probably wasn't cancer and we'll never really know because we didn't do the surgery to verify. At the end, we don't know what exactly was wrong as the blood work and other tests didn't show anything obvious. But he was very sick and we knew it was time to let him go peacefully. He was 14 which is quite old for a Frenchie.
I know it's a hard decision.
He managed to surprise us all and lived almost two years longer. We just lost him this last February. So it probably wasn't cancer and we'll never really know because we didn't do the surgery to verify. At the end, we don't know what exactly was wrong as the blood work and other tests didn't show anything obvious. But he was very sick and we knew it was time to let him go peacefully. He was 14 which is quite old for a Frenchie.
I know it's a hard decision.