一番好きな動物はって英語でなんて言うの？

My favorite animal is a dog. I absolutely love dogs because they are loyal, cute and great company. This is why if I had to pick one animal that I like the most it would be a dog.

Favorite= like the most

When you want to ask someone what their favorite animal is, then you may ask in the following ways:
-What is your favorite animal?
-Which animal do you like the most?

Most people could name an animal that they prefer over other animals. Maybe because of the way the animal looks, it's attitude or just that they are gentle animals. A large number of people around the world's favourite animals are either domesticated cats or dogs.
Both of these answers above ask someone the question "What is your favorite animal?"

To enquire of someone what their favorite animal is, the exampled sentence above is more than adequate and quite typical.

Many people are animal lovers so it's a good topic of conversation. You could just go right out and ask a person if they have a favourite animal or delve a little deeper and ask them to compare to other animals or to explain why they have a preference. It's always a good ice-breaker.