I have 6 feathered feet friends my run is covered by chicken wire only I do have a very large coop area 17 ft diameter, if is raining real hard the brahmas stay in but since I laid a good layer of shavings in the yard as well their feet are clean and dry out there as well. I am in Mossyrock and we get some real nice rainsI don't believe they require special care, but mud makes them messy. If the mud froze it might be a problem. Mine have a dry house and covered run so hasn't been an issue. Others may have insight.