Front dew claws are not useless actually. Sophie, the dog in my avatar, would use hers to great effect gripping things, like a little thumb. Rear dew claws on the other hand do not have a purpose.
I would not remove the front dew claws of my dog(s), regardless of age. You wouldn't remove someone's thumb because it *could* get hurt, would you?
That said, the booties probably would work, but also keep in mind that you could probably just wrap a little bit of cloth tape around that part of the foot, keeping the dew claw out of harms way.
Booties are both good and bad. Make sure you get your dog used to them because they can take some getting used to. It probably also hinders their agility. But, on sharp, rough surfaces you'll absolutely want them.
Also, perhaps on hot surfaces.
To make it easier for your dog to get used to the booties, put them on right before something fun. They tend to forget about the booties much easier that way. Also, don't laugh at them (seriously).
Also keep in mind that your dog sweats through it's pads and prologed trecking in boots might hasten heat exaustion as they don't sweat over their full skin like we do.
Also, be careful of dog packs. Dogs really aren't built to carry much "backpack" style like humans. I would avoid puting much weight there.
Many packs (and harnesses) chafe, often in the 'arm pits', when used much and could be considered similar to ill fitting boots on humans. As with the booties, the key is to find out what works and what doesn't, as well as getting used to them *before* you are in an emergency situation.
-john
You can see some dew claw action in
this picture if you look closely.