Today's office guest Otis pawsitively loves our #RedMittens. pic.twitter.com/uo6iP7WsXK

— CDN Olympic Team (@CDNOlympicTeam) September 20, 2013

@NHL tongues out guns out for @ErikKarlsson65 and the @Senators #HockeyPets pic.twitter.com/xrI8pGZgPs

— KCP (@kcp8_) July 18, 2014

Hi Bailey! RT @GeoffYzey19: @MapleLeafs #NationalDogDay Here is Bailey, he is a huge leafs fan like his dad! pic.twitter.com/dQT5ESArrf

— Toronto Maple Leafs (@MapleLeafs) August 26, 2014

.@PKSubban1, we've found your cutest fan. ^ER "@alex_biron: bigg habs fan here @CanadiensMTL @NHL #NationalDogDay pic.twitter.com/KsXNsjJpgm"

— Canadiens Montréal (@CanadiensMTL) August 26, 2014

@NHL pic.twitter.com/LfouDeC0kx

— Calgary Flames (@NHLFlames) August 26, 2014

Hmmm… think he'll grow into the gear?! –> RT @The_RealHeal @EdmontonOilers #HockeyPets #NationalDogDay @NHL pic.twitter.com/ljmDK3o3TY

— Edmonton Oilers (@EdmontonOilers) August 26, 2014

he doesn't like pictures but, happy #NationalDogDay! @VanCanucks @NHL pic.twitter.com/9jffis5x6J

— amalito (@amalitoh) August 26, 2014

@NHL some pretty cute #hockeypets but this @NHLJets fan is the cutest #gojetsgo pic.twitter.com/Q8i7U5aD2L

— Kyle McClintock (@KMcClintock85) July 17, 2014

@NHL pic.twitter.com/BdLb79S3jb

— Melissa Mandel (@MelissaMandel1) July 17, 2014

@NHL Best goalie in the league #HockeyPets pic.twitter.com/3B2b8GoQgM

— Pat Kelly (@patkelly2324) July 17, 2014

Today is #NationalDogDay tag all your #NYR dogs with #NYRuff and we will retweet our favorites throughout the day! pic.twitter.com/n8Bq4d7fzg

— New York Rangers (@NYRangers) August 26, 2014

It's the dog days of summer & #NationalDogDay Share photos w/ us & @NHL Here's Pasha our office dog a @mhumane rescue pic.twitter.com/ssn5Lv2xNS

— Detroit Red Wings (@DetroitRedWings) August 26, 2014

@penguins This is Crosby! He wants to meet His namesake! #nationaldogday #enddogfighting pic.twitter.com/DUP9jNPTPb

— Mary Kennedy Withrow (@mwithrow02) August 26, 2014

My best friend likes to dress like me.. #NationalDogDay @NHLBlackhawks pic.twitter.com/iBohDjDeVx

— Caitie MacFarlane (@cmaaccc) August 26, 2014

By popular demand… Sharp and his pal Shooter: http://t.co/URMhe0tB9I #NationalDogDay pic.twitter.com/fkOXvf2DoZ

— Chicago Blackhawks (@NHLBlackhawks) August 26, 2014

. @NHL @BluejacketsNHL my dog Easton is my biggest fan #nationaldogday pic.twitter.com/LWqIYLZyQo

— Cam Atkinson (@CamAtkinson13) August 26, 2014

Happy #NationalDogDay! #RiseUp pic.twitter.com/FGucu1i6KU

— Atlanta_Falcons (@Atlanta_Falcons) August 26, 2014

The dog days of summer. Literally. #NationalDogDay #FlyEaglesFly pic.twitter.com/46gegrIzIk

— Philadelphia Eagles (@Eagles) August 26, 2014

Fancy fellow and #FlyEaglesFly. Happy National Dog Day, #EaglesNation! pic.twitter.com/YjO3JCeq6X

— Philadelphia Eagles (@Eagles) August 26, 2014

Tweet us photos of your canine in Trail Blazers garb using #PinwheelPets and we'll RT the best ones! #NationalDogDay pic.twitter.com/oxEbDax3f5

— Trail Blazers (@trailblazers) August 26, 2014

@MiamiHEAT he only looks sad cause he's ready for the season to start lol #nationaldogday pic.twitter.com/16VLo1s3OV

— Josh Chambers (@justJOSHinYA_) August 26, 2014

Check out who's celebrating #NationalDogDay in their Wine & Gold best! Send us your pics with #CavsDogs. pic.twitter.com/rQOdPomm4d

— Cleveland Cavaliers (@cavs) August 26, 2014

Happy #NationalDogDay to the best canine in the biz. Does your pooch love the #Cavs? Tweet us your pic w/ #CavsDogs pic.twitter.com/LExDaAfEfu

— Cleveland Cavaliers (@cavs) August 26, 2014

It's #nationaldogday, but no dog is as cute as @rockybulldog! RT if you agree! pic.twitter.com/VKntrpUoax

— UNC Asheville Alumni (@uncaalumni) August 26, 2014

Celebrating #NationalDogDay with a little beach volleyball! #dogdaysofsummer pic.twitter.com/UtnRotaxIs

— RBC (@RBC) August 26, 2014

Hey it's #NationalDogDay so I salute our family dog & @Cubs fan Ben. @WTHRcom pic.twitter.com/dBEXoLcHr5

— Chuck Lofton (@ChuckWTHR) August 26, 2014

Happy #NationalDogDay / College Football Kickoff Week http://t.co/t8dgltaSmU pic.twitter.com/cMaZ6uQqy5

— Fancred (@Fancred) August 26, 2014

Meet Bamba, the soccer dog extraordinaire! http://t.co/iQdCAOZVZi #NationalDogDay pic.twitter.com/0hKsuSM57Q

— US Soccer Foundation (@ussoccerfndn) August 26, 2014

Kote Boz hanging on the set! #nationaldogday pic.twitter.com/XfXGhbjXXV

— FOX 13's Jen Epstein (@Fox13Traffic) August 26, 2014

Did you know that @KeriHerman (Minnesota) was a hockey player growing up? #NationalDogDay pic.twitter.com/qmNt5TbNUp

— NBC Olympics (@NBCOlympics) August 26, 2014