Say your list is on Sheet1.
In A1 of Sheet2 enter
dog
Then in A2 of Sheet2, try this *array* formula:

=IF(COUNTIF(Sheet1!B$1:B$5,A$1)=ROWS($1:1),INDEX( Sheet1!A$1:A$5,
SMALL(IF(Sheet1!B$1:B$5=A$1,ROW($1:$5)),ROWS($1:1) )),"")

--
Array formulas must be entered with CSE, <Ctrl <Shift <Enter, instead of
the regular <Enter, which will *automatically* enclose the formula in curly
brackets, which *cannot* be done manually. Also, you must use CSE when
revising the formula.

*After* the CSE entry, copy down as far as you anticipate the number of
returns you'll get.
Make sure you copy down enough rows to ensure *all* possibilities are
displayed.
--
HTH,

RD

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"CParker" wrote in message
...
Sample data:

Column 1 Column 2
Labrador Dog
Beagle Dog
Siamese Cat
Toucan Bird
Poodle Dog

In a separate spreadsheet, I am trying to create a formula that will
search
in column 2 for "Dog" and return all individual instances in column 1 in
separate rows:
Labrador
Beagle
Poodle

Any suggestions?
Thanks!