Urinary Incontinence: Home Cures for Bladder Disorders

I have a dog from the mastiff family, he's 10 yrs old and suffers from incontinence. I have thrown away so many beds, which were orthopedic, very expensive, I tried going to a fabric store and buying plastic that we cover furniture with, I put it over his bed and put a blanket or sheet over it tying it under his bed so he can't remove it. If it urinates, I just wash his bedding, it works wonders!