>  CS> Cash is to be on it forever.  He still tests positive but due to
 >  CS> treatment record, they say he's safe for other dogs to be around as
 >  CS> well as our rescue kitty Daisy.  Daisy however will also be put on
 >  CS> preventive.
 > 
 > Heartworm isn't contagious like a cold is.  Heartworm is passed to dogs (and
 > cats) via a bite from an infected mosquito carrier.

Thats what we thought but there was some confusion at the start.
                 xxcarol

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