A person with Jupiter in the 6th house needs work that they can be proud of. They want to be significant at work, in the team, to be influential, to have the respect of colleagues, co-workers. Therefore, they want to stand out at work, get a high position, an important and honorable place at work.
Or they may not have a high position, but work in a prestigious place, in some cool company. Or work through connections. Or Jupiter is worked out quantitatively - they may have several jobs, one main one, another as an additional income, but they want to keep up with everything, be the best, successful and stand out somehow. Or the person's work is related to prestigious people - for example, serving VIP clients - in banks, on planes, in restaurants, in hotels.
But it should be noted that Jupiter in the 6th, just like Jupiter in the 3rd, feels cramped here. This is symbolically the Mercurial house, the house of Virgo. And here the person can scatter their goals, try to please everyone, be good in the eyes of others. And it turns out that the person gets stuck on trifles, losing the main essence. They try to help everyone, get scattered a lot, cling to endless details, and thereby do not see the big picture. It turns out that they want to achieve too much in this small space.
In most cases, they do indeed achieve a good position. Initially, the person sets their sights on career growth.
In terms of animals - they often prefer purebred, with a pedigree, with a passport, so that they can be shown, be proud of them. It is not necessary to participate in any exhibitions and win titles, medals, but this is not excluded in principle. It is enough that passers-by on the street are delighted and admired by how cool your pet is, and this inwardly causes you joy and pride in your pet - "Yes, he's such a cool one!"