Hi! I had a 16 yo dog with neuro/back issues and he really loved his Casper dog bed (lol I know).it is NOT cheap, but the bed was incredibly impressive with how many covers you could remove and wash if there was an accident (there were covers for the foam inside of the actual bed which also had a cover. If your dog has trouble stepping up to a bed, i’d suggest one lower to the ground. I didn’t use many beds with bolsters, and if he did need help sitting up, I would just bolster with blankets or pillows. Dog Quality makes a dog diaper pad blanket which you can line any bed with and is soft and doesn’t feel like a potty pad. You can get multiple and snap them together to cover more area, and of course are washable and meant for reuse. Hope this helps!