I have had many dogs and fish before. I recently lost a dog due to old age and love small and big dogs. I have been raised with dogs and understand their behavior. I am allergic to cats, which is why I couldn't sit for cats. My house's yard is a nice size and has a tall fence for large dogs. Pitbulls are not allowed in my area, so I wouldn't be able to sit them, but wouldn't mind going over to someone's house to care for one.