My dad is an 87 yo Parkinson's patient with both urinary and bowel incontinence. He is also a Veteran who receives Aid and Attendance help 3 times a week in the AM. The problem is this: is there service for incontinent patients where you can call and have them come to your home to clean up the patient, pretty much at a minutes' notice?
Once my Mom passed, my Dad hired caregiver 24 hours a day. It was very expensive at $20k per month, yes per month. It was one of the "rainy day" expenses that Dad needed to use from his savings.
My Dad realized that I couldn't be his caregiver as he was a major fall risk, no way I could pick him up... it would be like picking up 160 lb solid weight at the gym. Dad decided he would like to move to senior living, and he loved it, he said he wished he would have moved there years ago. It was a lot cheaper then having 24 hour caregivers. He liked being around people closer to his own age :) And all the attention from the Aides.
I would not like to see my mother go to a nursing home, but if she becomes incontinent, that will be the only option, as she has no funds to pay for care at home. I know that I will not do toilet duty, because for one it's gross, for two it's way more intimacy than I wish to have with my mother, and for three it ties you up round the clock. You have no freedom to live your life once you become responsible for someone else's bathroom habits. I think it's more than anyone has the right to expect from their adult children.
If a nursing home is not an option, then I think the suggestions about regulating bathroom habits are the best answers.
I heartily second what heatherb67 said - the available services fall way short of what is needed. I think there is no political will to expand the services provided to families, and people are just so used to the status quo and refuse to recognize that the status quo just doesn't work for many people (starting with seniors who have no adult children to provide care to them, and including adult children whose careers, finances, retirement plans, health and personal goals are sacrificed to the care needs of aging parents). It's a sad sad situation, and I agree, totally unacceptable.