A number of us are concerned about this, so here are some excerpts of interest.
Watch for: limping, swollen or red feet hot to the touch, tissue sloughing off
risks associated with frostbite include gangrene
If feet frozen to ground, pour warm water (90F to 105F NO HOTTER - emphasis mine) over feet until they are freed
Rapidly warm the feet in water bath that is 105 to 108F for 15 to 20 minutes, giving lukewarm water to drink
Do not rub frostbitten areas
Severe damage will need to be treated like an open wound, and penicillin or Terramycin may be needed to reduce chance of infection
If no large water body available, enclose ducks in a yard or shed with a thick layer of bedding and wind protection if below 20F
Watch for: limping, swollen or red feet hot to the touch, tissue sloughing off
risks associated with frostbite include gangrene
If feet frozen to ground, pour warm water (90F to 105F NO HOTTER - emphasis mine) over feet until they are freed
Rapidly warm the feet in water bath that is 105 to 108F for 15 to 20 minutes, giving lukewarm water to drink
Do not rub frostbitten areas
Severe damage will need to be treated like an open wound, and penicillin or Terramycin may be needed to reduce chance of infection
If no large water body available, enclose ducks in a yard or shed with a thick layer of bedding and wind protection if below 20F