La Toya Jackson -- My Dogs Only Drink FIJI Water

La Toya Jackson wants nothing but the BEST for her two dogs -- telling TMZ, her little flea bags drink ONLY Fiji-brand water.

La Toya was out in Beverly Hills Sunday night when we asked her all about her two pups -- named Prince and Paris ... after La Toya's famous niece and nephew.

And that's when she dropped the bombshell -- telling our camera guy, her furry friends ONLY drink that ridiculously expensive Fiji-brand artesian water in those clear plastic bottles.

And they still probably lick their own butts.