Please wish my Bif boy luck

Bifur is 10 in September and has been dealing with some symptoms our vets haven't been able to pinpoint the cause of for a couple years - yesterday they found a large mass and tomorrow he's going in for a splenectomy. His odds aren't awesome but we're giving him a chance.

He's just the best guy, everyone Bif meets loves him, from scared kids to wildlife. Happiest sunshine soul. He's saved me so many times.

He's had a great day just in case - a ride in the car, beach walk saying hi to plenty of strangers, ice cream, a trip to the pet shop for treats, salmon, watermelon and steak (his faves) and I'm reading The Hobbit to him, but haven't finished yet. Hoping the story isn't over and I'll get to read the end to him.

Any success stories, well wishes, prayers, anything would be welcome - I'm so scared for my little man