Gypsy Sisters -- CANCELLED!!!

The "Gypsy Sisters" are packing up their caravans and crystal balls because the show just got the boot.

Sources close to production say the cancellation was due to dwindling ratings from previous seasons of the show ... TLC simply felt it was time to move on.

We're told discussions for a 5th season were already on the table ... and has nothing to do with the dog killing incident from last week ... but that probably didn't help.

Kayla, one of the sisters, posted a message apologizing to fans for getting the ax.