Warning: the following exercise may cause temporary loss of sanity, permanent damage to your self-respect, and an increased risk of being forced to re-watch "The Grammar Police" documentary.
Read the following paragraph and try to identify the grammatical errors:
"The dog wuz bitin' the cat. The cat wuz bitin' the dog. The end."
Write a sympathetic letter to the poor dog, or comment on the thread if you think you can do better.
Don't forget to use subject-verb agreement rules when crafting your masterpiece!