Paris Jackson spent most of Saturday with her biological mother Debbie Rowe -- looking at horses, playing with her hair ... real mother/daughter stuff -- and what's particularly interesting ... they were hanging the same day as grandma Katherine Jackson's birthday.
Paris and Debbie were way out in Palmdale, CA where Debbie lives -- so if Paris saw Katherine at all yesterday ... it wasn't for long.
The belated bond between Paris and Debbie is clearly tight.
Spends Day with Mom
on Grandma's Birthday
5/5/2013 6:45 AM PDT BY TMZ STAFF
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