First of all I would call my vet and ask him what I should do about the cut. Depending on the severity of the cut the Vet will then decide if I should bring the dog in right away or if it can wait for next day treatment.

Then I would clean the wound on the dog's foot thoroughly with an antiseptic cleanser, such as Dettol or hydrogen peroxide. No rubbing alcohol, it is not good for the tissues. I would Keep it open as much as possible.

The worst cuts are the ones that look the smallest, i.e., puncture wounds. Small opening and deep penetrating wound is the perfect breeding ground for bacteria. Dogs' teeth, as you can well imagine, tend to produce precisely this type of wound. So watch your dog closely, and inspect him from head to toe every day.