We use Outward Hound backpacks and LOVE it. We had another brand, can't remember the name, that kind of fell apart.
For water, we use the Gulpy water bottle and I bait it with a small amount of chicken broth to encourage her to drink.
We use Musher's Secret on her paws to keep them healthy. I feel like it's really beneficial, especially since we're urban runners and mostly run on the sidewalk or on our levees out here (with a ton of small rocks that could cut up her paws).
Due to her leash reactivity, we use a yellow leash with the words NERVOUS printed on it. It helps, A LOT.
Finally, we do use Doggles on the few days where it's really, really windy. I don't want crap getting kicked up in her eyes, just like I don't want crap getting kicked up in mine! We get some SERIOUS smiles when she models those.
And for her human companion, I do have a couple running shirts with a dog carrying tennis shoes on them. I'm proud to brag about running with my furry friend.
As I mentioned, I tried the booties but those really didn't work well.
On Amazon there are about 10 different stick on "Pad grip" products.
I'm taking a two prong attack.
1) Part of the issue is when their pads get dried out, it's like when you get calluses on your feet, they just don't grip as well.
So we're going to start putting on the "paw balm" (it's called mushers) daily.
And, don't forget to (carefully) trim the long hair between their toe pads. They get better traction without the hair in the way.
I am not a doctor, but I would assume that if his pads are softer, they will be grippier.
https://www.amazon.com/Mushers-Secret-Pet-Protection-200-Gram/dp/B0002XIZXY
2) The second approach is also to try these different "grippy sticker" products.
For our dog, it's not his front feet that are the problem, it's the rear legs. He's had knee surgery already and sometimes his rear legs just slide out from under him.
So I think if we can give him more traction on the back legs, that's going to be very helpful.