How do you feel about me being abusive to my childhood pet?
Are you joking around right now? Why would you ever abuse your pet?
The dog was annoying me all the time.
Just because your pet is annoying you does not give you an excuse to abuse it. Harming an animal is one of the worst things you can do since you are trusted to take care of them. If people find out about this, they will think you are a terrible person.
No one will ever find out about this.
It doesn't matter if no one finds out, what you did was still wrong and hurting a defenseless animal is considered such a terrible thing by so many people. You should try your hardest to never do something like abusing a pet again.