The gears inside my head are turning.
Since Marcia is traveling with one other person, 2 large bird cages (with birds of coarse), and 3 cats, I wonder if a more dramatic modification might provide the solution, of coarse with sacrifice to something else.
If the couch inside the slide out was removed, then install a captain seat with pedestal like we have by our entry door, the change might provide enough out-of-the-way space for your little companions. The cages could be mounted higher, the floor below for cat beds or litter box, the space in between could be cabinets to store all pet needs. You might need to buy cages specifically fitting the motor home, not use the ones from home.
Unlike the bedroom shirt closet sacrifice idea, the birds would always be in "day" space, I think a better social setting.
With the new captain seat mounted forward inside the slide out, it would be directly across the isle from the euro chair where a table could be set up as needed for the two people to eat at. If you replaced the euro seat with another captain seat, then you would have four matching seats which would look like the rig was designed that way to begin with. Captain seats to match your front ones can be ordered from Phoenix regardless of the year the rig was made. You would need to get pedestals & seat belts which Phoenix can supply. Then go somewhere local to have the changes made. Each additional captain seat will cost $500-$600 including pedestals, seat belts, and shipping. With specific dimensions, Phoenix can even build a cabinet inside the slide out per your specifications, and it would match the rest of the interior like it came that way from the factory when new. I would wait to order the cabinet until after the seat was mounted to know exactly the remaining space you have to work with to maximize the size and configuration of the new cabinet. I would imagine the cabinet could cost around $500 including shipping. Call Phoenix for prices on the chairs and cabinet to know exactly what such an idea would cost.
The captain seat pedestals adjust in all directions so they can slide out into the open floor space as needed to eat at a shared table or watch TV better.
Just tossing out this idea, one of many from the PC family.
Ron