like these photographs are interesting, but then mid-2020's internet venacular seeminly requires "so I was having a bad day then I saw this on my way to work"
Using “it” for an animal is perfectly reasonable. An argument can be made for using they instead but we even use it for humans occasionally (e.g. Jack checked on the baby, it was sleeping peacefully).
If you had a Great Pyrenees (Dog pictured) - you absolutely would not be wondering. They are livestock guardian dogs and some of the most stubborn dogs you will even interact with.