I understand what you are asking. How much is considered adequate space for the combined occupancy of humans and animals which include Support, ESA, and Service Animals. Good question, especially if the space is small and the combined occupancy is large. Just because the doctor says they need 3 different animals each for 2 people, that shouldn't mean we as the housing provider have to accomodate 6 animals and 2 people in a 1 bedroom 600 sf apartment that they chose.
If you have counsel, I would try to get their advice, on whether we can enforce some type of occupancy limits when combining people and animals in a unit. There must be a common sense limit, that we could enforce even with disabilities present for the health and saftey of all. I will be following to see what other input you receive.