I should feed the dog some rat poison with his dinner.
Why on earth would you feed a dog poison?
I'm tired of this dog. He has been running free in the streets all day, and he always brings his snotty nose into my house.
You are frustrated with your dog, but poisoning it seems to be one of the worst things you could do to an animal. Keep the dog in your house, why let it run free if you don't want it doing this? If you could poison a dog, then you will start poisoning people too which is even worse.
Sorry, I'm a terrible person.
It's okay, you just should never feed an animal poison just because you want to get rid of it. There are many other humane ways to get rid of a dog.