What is a good moisturizer for a dog's pads?

Vaseline works just fine. A dab on the paws before bed and a dab before walks. If you want I'd shop for one but you can make homemade moisturizers for your dog.

Shea butter Lavender oil (Lavendula augustifolia) (I chose this because of its calming healing properties) Vitamin E oil Beeswax Olive oil. Pure. Organic. Extra Virgin Little metal containers All the products that I got were all natural, human grade. The actual making was super easy: I used a double boiler over low heat and combined 4 tsp. of beeswax 2 TBSP of shea butter 2 TBSP olive oil about 1 tsp of vitamin E oil a few drops of lavender oil I stirred all the ingredients together until the beeswax melted and then poured it into the round metal tins and let it set. I only use this as needed. For instance, I won’t use this every single time the dogs go out in the snow in the backyard, but I will use it when we are going for long walks. You don’t want the pads to become too soft, as this may cause more injury. Also, remember that keeping the hair between your dog’s pads can make the balm easier to apply and help minimize snowballs. From: http://mybrownnewfies.com/2013/12/12/homemade-paw-balm/

4. Moisturize, moisturize, and then moisturize. Your dog’s pads can easily get dry and cracked so ask your vet about good pad moisturizers designed especially for dogs. Do not apply hand moisturizers for humans as it could soften the dog’s pads; thereby, possibly lead to unwarranted injury. From: http://www.dogingtonpost.com/paw-care-taking-care-of-your-dogs-feet/