Some past photo contest themes:

2003
February -- Labs & Kids
March -- Wearin' o' the green
April -- Springtime!
May -- Cool Lab Tricks
June -- Sleeping Dawgs
July -- Labs & water
August -- Funniest pictures of your Labs
September -- Airborn Labs
October -- Noble Labs
November -- Dirtiest Labs
December -- Caught in the Act (guilty Labs)

2004
January -- Labs & their best friends
February -- Labs as part of the family
March -- Expressive Lab Faces
April -- Lab Tummies
May -- Dressed up Doggies
June -- Labs at Play
July -- Dog Days of Summer
August -- Labby Smiles
September -- Labs in Black & White
October -- Fall-outdoorsy/Halloween
November -- How our Labs makes US laugh (Labs w/human laughing)
December -- Santa's Little Helper

2005
January -- Labs in Snow (or water :) )
February -- Labs in their element (taking walks/hiking)
March -- Labs Retrieving
April -- Labs & Kids
May -- Labs in May Flowers
June -- Labs and their Dads
July -- Labs on V-A-C-A-T-I-O-N
August -- Cute Captions
September -- Funny Sleeping Positions
October -- Halloween theme
November -- Dogs with their favorite toys
December -- Muddy/dirty Labs

2006
January -- Leapin' Labs
February -- Best Friends
March -- Kissing Labs
April -- Spoiled Labs
May -- Labs in Motion
June -- Rescued Pets
July -- Summertime Outdoors
August -- It Wasn't Me!!
September -- Senior Labs
October -- Fall colors
November -- Traveling Labs
December -- Happy Holidays

2007
January -- Labs Gone Wild
February -- Loveable Labs
March -- Favorite photo YOU'VE taken
April -- Pastels/ Spring/ Flowers
May -- Labs and Water
June -- Those Labby Tongues
July -- Vicious dogs AKA Bitey Face
August -- Funny Photo Captions
September -- Family Photos
October -- Sleepy Labs
November -- Labs Doing Chores
December -- Regal Labs

2008
January -- Smiling Labs
February -- Best Kiss Ever
March -- Labs w/favorite Toy
April -- Best Buddies
May -- Human/Lab Bonds
June -- At the beach/lake
July -- Your pup/dog/adoptee's first day home
August -- Birthday celebrations
September -- Picture that makes you LOL
October -- Halloween / Fall
November -- Looking out
December -- Show Me the Treats

2009
January -- Bonding
February -- Flying Ears
March -- Butt Tucking / Running
April -- Tongues
May -- "I beg of you!"