He suddenly has developed a huge tumor on his leg; it seemed to grow overnight. The vet looked grim, saying that its sudden growth didn't look good. The tests will be back next week. It's the kind of thing where you steel yourself for the worst.
Easy to say, of course, but harder when you have loved an animal and know they won't be with you much longer. My husband always says it is harder to leave the pets when he goes away than it is to leave me, because the pets don't know. It's the same way when something goes wrong. The pets don't understand. They watch you wrap their leg with vet wrap, trusting that you will make it all better. But you can't, sometimes.