My bulldog had his spleen removed at 9 1/2 years old. He did really well until12 1/2 when he had a massive stroke in his crate. He died peacefully in his sleep. As horrible asit was for me, he went peacefully. Sometimes stuff just happens that no one can have control over. It appears he went peacefully and for that you can be grateful. My heart goes out to you!
I am so sorry about what happened, and it was such a shock to you too. Sometimes when a dog appears mildly sick, we cannot know that something else is going on. Very often a dog will get an upset stomach, vomit, and then be absolutely fine afterwards. I can be very hard to tell.
Did he, do you think -eat anything from the trash? Even something which might have appeared harmless? When he vomited -what came up?
It's very hard when something like this happens, and you want to know "What was the cause?" because it doesn't seem to make sense.
Why did he have his spleen removed? Did he have another health issue?
I am just so sorry.