You should not let the cut or any wound open and untreated in your dog because infection can develop and things will become bad for you and your dog. If the cut in your dog is deep then it may require stitches that can be done by the vet.
If the cut is minor then wash the wound with warm water and Epsom salt and then apply topical antibiotics and then use proper bandage. This bandage is necessary because dogs can lick their wound. You can purchase this topical antibiotics from pharmacy. But it will be more better if your dog get proper treatment from your local vet.
If the cut is minor then wash the wound with warm water and Epsom salt and then apply topical antibiotics and then use proper bandage. This bandage is necessary because dogs can lick their wound. You can purchase this topical antibiotics from pharmacy. But it will be more better if your dog get proper treatment from your local vet.