I don't think I have any advice or anything factual to to add to what has already been said. I just wanted to say I'm so sorry. I lost my dad to Lewy Body Dementia a year ago yesterday (Dec. 28). It is so, SO hard to watch a parent face this decline.
Hospice can be a scary word, but think of it in this way... Hospice is really just laying in place what you probably know already needs to be done, before it's too late. It's never something we WANT to think about, but usually it's the step we knew we need to take, and we just need some encouragement and help in taking the next steps (yeah, that paragraph was probably a bit redundant...)
***Disclaimer of sorts*** Below I share my dad's story, which isn't so much hospice related, just his... progression, which was fairly quick in the end, and I don't want you or anyone else to be discouraged by it.
For my dad, he had been declining slowly for a few years, mostly on the cognitive side, but, physicaly, was doing farily well... Walking on his own most of the time (though unsteadily), getting up with assistance, etc. But then he had a fairly rapid decline. He had a fall in October (didn't break anything, and no stoke, heart attack, etc.). which began his rapid decline. My mom cared for him in our home, with the help of the AMAZING support he got through the VA. We were amazed at all that the VA did for us, considering my dad served during peace time, and had no service related disabilities. They provided us with a ramp, wheelchair, hoyer lift and hospital bed, as well as in-home health care. There is no way we could have cared for him at home like we did without that assistance. In a way, I think it was a good thing that my dad passed so quickly after his fall, because my mom wouldn't have been able to keep it up at home for much longer, even with the help we were receiving.