I don't know, I can think of more than a handful of bratty children that deserve all the negative connotation of the word, and often times more.
But I don't think there's anything wrong with spoiling a dog as long as doing so doesn't harm them or other people. I see people "spoiling" their dog by feeding them too much and making them obese, and that I don't agree with because they're putting the dog at risk.
Mom to rescued lady Anabelle and Harley, beagle mix mutt
"Saving just one dog won't change the world, but it surely will change the world for that one dog." - Richard C. Call
Lila Over the Bridge. RIP.