Hello from Minnesota (I know my username says Vermont lol). I use Musher's Secret in the winter when the conditions aren't so cold/harsh as to need booties. Yes, you want to trim the hair that grows between paw pads, but only cut it flush with the paw pad. This will help with excess snow build-up between the pads. Apply a liberal coating of the was on all paw pads before going out into the snow/ice. It will protect the pads from ice burn or super cold snow, as well as salt/deicer. That's what I use it for, not as a conditioner for the paw pads. I haven't heard of it being used to condition the pads or toughen them up or soften them up. I would use something like udder cream for that purpose. Since I only apply it when going outside for long hikes, I don't have the problem of my dog licking his paws. If you do have salt/deicer used a lot in your area, be sure to wipe down your dog's feet with mild soapy water when you get in. If they lick the deicer off their paws and injest, they can become very sick. (Depending on where you live, some townships use nontoxic chemicals for deicing roads. Others do not. I choose not to risk it and just take my dog on hikes out in the country and not on roads). If conditions are harsh, wear booties. Keep yourself moving forward and go for a half hour or more duration. She/he will settle in and soon ignore the booties.
Hope that helps! Just info on what I do.
Danielle