Hello - looking for recommendations for collars that are the least likely to cause an indent/ring to form in the fur around the neck. George wears a collar most of the time, except overnight or when we are not home. Also, we use a harness for leash-walking, not the collar, but he's got a pretty serious indent forming! I've read that rolled-leather collars are better for this - but is the best solution just to reduce the amount of time he spends wearing (any) collar?? Any suggestions would be great! Thanks!