I recently lost my OAP.
My DD also has a pony, who took my OAP’s loss a lot better than I expected - they were super bonded so I was preparing myself for the worst, but she’s coping brilliantly.
I always found it easier with the 2 - we could do our own thing with turning out/bringing in, etc, and were never reliant on what other liveries were doing with their horses.
Pony is fine out on her own for a while, but not all day, so if it’s raining and other liveries decide to keep theirs in for the day, I end up leaving DD’s pony in too.
I was thinking about taking a companion on loan, however, DD’s pony and my OAP were so bonded that all hell broke loose if you ever took one away from the other - DD is really enjoying being able to grab her pony and ride, hack, etc without worrying about the half ton tantrum - so I am nervous about ending up back there again.