I would work with animals; maybe at a cat shelter, or have a pet "hotel", or maybe a dog daycare or walking service. Animal welfare laws are very strong here and dog owners aren't allowed to leave their dog alone for more than four hours at a time. This means there is a lot of potential business for dog daycare and walking services since not everyone can take their dog to work with them or come home for lunch. But basically anything involving taking care of or helping animals would do.