Meaning: This means that the cat is taking a short sleep on the covered area outside the house that has railings.
Choice of Words: The cat is the animal that is taking a nap. A nap is a short sleep, usually taken during the day. The veranda is a covered area outside a house that has a roof and is often surrounded by railings.
The kitty cat dozes on the patio
Meaning: This means that the cat is taking a light sleep on the paved outdoor area that is used for relaxation.
Choice of Words: The kitty cat is a friendly way to refer to a cat. Dozes means to sleep lightly. The patio is an outdoor area that is usually paved and is often used for relaxation.