Temperature is mid 30s this past week but we had a cold spell about a month ago. They have a large enclosed run that was recently cleaned. They also have access to their pond, which was frozen over during the cold spell, I since bought a heater to keep it open. Since I noticed her foot we’ve taken her in nightly and put her in the tub. Clean it with vet spray. Then wrap it for the night. Bandages are removed in the am. None of the other ducks or chickens have any issues.