The Appointment

Today I made an appointment to take Shiloh to the vet. I'm really nervous about it. I decided to write about it as I'm at such a loss as what the right thing is to do. Maybe you're going through the same thing, or maybe you've been there and can share your experience. I need help, and it's time to get my vet's opinion as well.
Shiloh's body overall is experiencing muscle wasting. His rear is weakening and he has difficulty on smooth flooring now. Along with Dusty, Shiloh needs help up the wooden steps. He's losing bowel control and I've discovered a lump on his neck. I don't know if it is a swollen lymph node but it's where a lymph node should be. The tumor on his front foot continues to grow. He walks with a slipping rear and a sore front foot. He cannot run. He has anxiety attacks.
But on the up side, he is still hungrily eating his food and has bright moments. He still adores his teddy bear and is always delighted when I bring it out. He makes eye contact with me and wags his tail.
It's just hard seeing my dog who was always so in the moment, so filled with gusto and energy, has been reduced to this. Everyone has told me he'll let me know when it's time. I'm not getting that, but I'm also not getting that he wants to continue. It seems he's just.....existing.
So today we will see the vet. I think the Prednisone is causing the muscle wasting. Maybe there's a different strength or something different we can try. If not, I need her opinion as to what she would do.
It sort of reminds me of my dad when he had cancer. The deterioration was so slow. We didn't want to remember the dad who had cancer as it slowly stole him away from us. And so it is with Shiloh - I don't want to remember what we are going through now. My heart breaks for him every day.
Please say a prayer for Shiloh and I. I just want to do the right thing.