Gary : Okay, one of our hens has swollen FEET!!! it is not bumblefoot, as there is no sore (she has been well washed and searched)… BOTH feet are swollen and warm… I am on the net searching (bumblefoot is quite a popular answer), but since you are my default chicken help, I am asking you… thanks, Gary
My Reply : One thing I can think of that might make the feet look swollen is if the scales are starting to become raised, and if so that could be due to scaley leg mites. One common ‘at home’ method of treating scaly leg mites is to soak the legs and feet in warm water (and gently remove any loose debris around the scales), then soak the feet and legs in oil to smother the mites and finally wipe off excess oil and then apply a layer of vaseline – some people just apply a layer of vaseline without a pre-soak/smother. On this page http://www.bhwt.org.uk/information/external-parasites-on-chickens/ it is also mentions that Ivermectin® 1% spot on can be used.
Chickens can also get things like gout and arthritis so those may also be possibilities.