Welcome to HCM.
As you are working with RSPCA, I am assuming your rabies vaccination
is up to date. Coming to your wounds, dog bite wounds are not usually sutured unless very deep wounds. But these wounds need to be carefully attended to within 6 hours of bite with proper washing with soap and running tap water. Iodine
can be applied over them. If there is swelling and ooze like pus then most probably the wounds are getting infected by bacteria.
I suggest you keep the wounds as clean as possible and get a prescription for antibiotics from your GP.