I get wet everytime it rains and dogs come in smelling like "wet dog".
You can tell the weather is changing by watching our dogs. they are 11 and the pit/boxer mix had surgery for torn ACL's in both hind legs when she was a year or two old. Both dogs have joint problems these days. We have to take shorter walks when the weather changes. (you know, to avoid the rain, haha) They both take glyco supplements and pain pills.