If he has something with 4 (or more) legs, and now none of them are touching anything...... I'd say he has bigger problems than settling.
In this case, some kind of vortex, or parallel universe has opened in his house. I first learned about this phenomenon when I was 6, as they detailed it quite well on episode 3 of Lost In Space (this episode is when Dr. Smith was still very evil; long before he turned into an effiminate priss).
Some things to check for around the house:
When you enter a door, do you come out in a different house/town/city/state/country/planet? Do your children yell "They're here!" whenever you get static on the TV? Has a midget with tennis balls been pestering you about house cleaning?
These are just a few of the more obvious signs. Please be careful until you get this fixed.