My old boy has dementia at about 18. He would yowl and call out for help on and off chairs etc. He did get a tad incontinent, though mostly associated with a scare (thunder storms etc). We regularly checked with the vet to ensure he wasn’t suffering. Outside of that, there wasn’t much more that could be done. If you have some heat packs and a jumper you’ve worn for a few days, it can help during times your away