dialing down through successive fields based on count

i have a table with multiple fields that i want to query until i have less than a recordcount of 20, how should i write the query

table: mystuff

fields: fld1, fld2, fld3, fld4 etc

final recordcount: less than 20

i need to query all of successive field. no MAX as would limit the scope of the query

<cfquery name="myqry" datasource="myds">
    SELECT *

    FROM mystuff   

    WHERE fld1 = 'cats'  

          <cfif records GT 20>

               and fld2 = 'siamese'

                    <cfif records GT 20>

                         and fld3 = 'white'

and keep dialing through fields until recordcount is less than 20. i do not want to limit the records of each successive field but to get all for the next step down.         

</cfquery>

tnx in advance