Our Cavalier, Fred, has taken to barking a lot in the house as well as "marking" certain areas, especially in the kitchen. He and his sister Ginger have both been housebroken for several years, so we're puzzled why Fred has taken to marking things around the house. He also frequently barks at the front door, so we let him out to relieve himself, but most of the time he just sniffs the plants in our (fenced) front yard. When we let him back in, he'll go whiz on the kitchen floor.

This behavior began about 3 weeks ago. The only thing in the environment that has changed is that the temperature has gotten colder, so he might be reacting to that. During the summer and spring, Fred and Ginger stay in a pen outdoors, and maybe he misses that.

Any thoughts?

Thanks,

Roy Troxel