(Our other outside cat, Cleo, is spayed and we had every intention of doing the same to Shy, except she is extremely skittish and will only let you briefly touch her. Shy and Cleo were strays that came to our house last summer when they were kittens.)
We don't know why Sully is the only kitten in the litter, but Shy takes extremely good care of him. =)
The story behind the abnormally large name? My parents wanted to name him Bartholomew; Karlee, Deacon, and I wanted to call him Sully. So we combined the two to get Sullivan Bartholomew, though I think the rest of my family has taken to calling him "Bart" and I'm the only one who calls him "Sully."
And he seems to get along well with Deacon.