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Popeye the Sled Dog: Trading Spinach for “Slop”

If you’re going to spend hundreds of thousands of dollars on a hobby, you’d better really love it. Fortunately for Steve Duren’s 39 dogs, he’s smitten. Steve, who is a maintenance director at a nursing center in Spokane by day, is also a highly accomplished sled racer and dog dad to quite an impressive pack on whom he lavishes unbelievable amounts of food, gear, and vet care each year to pursue his passion.

Known as Sierra Racing Kennels, Steve’s team of race dogs is made up of 35 Alaskans, a mixed breed of lightweight running dogs. And while all of them are unique, perhaps none is as special as Popeye. Popeye is two-and-a-half years old and heading into his second racing season. As part of Steve’s A-Team, or primary race team, Popeye is one of his literal top dogs -- and he’s doing it all with one eye. 

Popeye was born with two eyeballs, but one of them never formed a retina, so he can only see out of one side. Despite his handicap, Popeye is an ambitious dog and loves to run, giving his whole heart to every outing and helping Steve’s A-Team find success all over the Western United States, where they enter approximately 10 races during each winter. 

In sled dog racing, there are four positions on the dog team: leader, the front two dogs who set the pace and steer; swing, the two dogs right behind the leaders who help them navigate and can take over if issues arise; wheel, the two dogs closest to the sled who are often the biggest dogs since they are first to shoulder the weight of the sled in difficult terrain; and team, all the dogs in between who provide additional power to pull the sled. Even with just one functioning eye (which Steve protects with Rex Specs on the trail!), Popeye is able to run in any position other than leader, making him an incredibly valuable and versatile part of the team.

To get Popeye and the rest of the team ready for the season, Steve begins their training regimen in September, carefully monitoring for the perfect conditions where temperature and humidity line up to ensure the dogs don’t overheat and can sweat efficiently. They start with weight training, pulling more and more weight until they are effectively hauling ATVs along their home-built trails. Once the dogs have built up their strength, Steve has them work on speed, scaling up to 14-15 mph over 40 miles, which is a solid, competitive race pace. Popeye and the team tackle both sprint and distance races during the season, so the varied training helps them prepare for everything from short distances to 100-milers.

During big races, the dogs can burn up to 10,000 calories, so where Popeye the cartoon character used spinach to power up, Popeye the sled dog and his teammates have whey powder and a special “slop” of raw beef mixed with water in addition to regular dog kibble to take in enough nutrition to stay in peak form throughout the season. 

And if all this training, feeding, and racing sounds like a lot for one person to handle -- it is, but Steve’s not complaining. He has always loved animals and wanted lots of dogs, and after seeing sled racing on TV when he was younger, Steve decided to try his hand. About 23 years ago, Steve started buying Malamutes, and his team did well, but that style of racing just wasn’t active enough for him. After meeting Iditarod veteran John Barron, he started learning about the Alaskan breed and soon began trading mechanical work for dogs that could make him faster. Race dogs are expensive, but Steve worked hard at his day jobs to be able to spend about $20,000 to build up his own team, and from there he worked alongside John to really learn the art of mushing. 

Steve starting winning, and the dogs were performing beautifully under his training, so he then began to breed his own dogs and grow his operations to what they are today. Popeye was one of the puppies bred at Steve’s farm, and in addition to helping bring home trophies for the kennel, he is also part of the family.

Steve takes his racing seriously, but at the end of the day, he does it because he’s an animal person. He says that as a musher, his number one priority is the dogs themselves -- if he takes care of them, they take care of him -- and that motto extends from remote trails in rough terrain to games of fetch on the farm to cuddling on the couch in the house.

For Steve, there’s simply no greater feeling than the moment in a race when he and the dogs have settled into a rhythm and everything goes silent. It’s just his breathing, the sound of the dogs running, and the wilderness. And he has no doubt that his dogs, especially one as determined as Popeye, feel the same way.

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  • EANelson: I wish I knew that you were running sled dogs when I was in Spokane, it would have been fun to meet.
    On the subject of dog booties in the summer, I will have to point out that Deb said Angus is a service dog, so he’s got to be out with her on hot streets and sidewalks in the summer. Even Spokane gets too hot to walk around barefoot for some weeks, so you can imagine anywhere south of there probably gets hotter for even longer = summer protective dog booties. I agree their feet need to sweat, just not outside on hot pavement.
    Good luck racing this season!

  • Sierra Kennels uses cotton woven material booties with elastic Velcro straps. They last a few runs, depending on the ground cover. Usually do not run them in booties except when the surface is crusted as in wet snow that has refroze. This tends to be hard on pads.
    Deb- sounds like your Labradoodle needs booties in the winter to keep the snow from balling up in the fur mostly. There is a spray to put on their fur to prevent this as well. Would advise against booties in the summers. Dogs cool off by their feet and mouths. Hot feet can be cooler by kiddie swimming pool in your dogs area, sprinklers keeping the ground cool and moist, or take on a walk at a lake, stream, etc.

  • I Have A Service Dog Who Does Not Run Iditarod But He Needs Shoes To Keep His Feet Cool In Summer And Warm and free of ice In Winter. He Is A Standard LabraDoodle Who has used bark ‘N boots grip trex
    Size large. (they have a lot of fur on their feet).
    Ruff wear makes them and they hold on well! Great sneakers. I purchased the socks as well because if you have a free pour, it does help to hold the Furrer down to get it comfortably in the shoe. Wish I could attach a photo with him wearing them but I can’t. Sizing goes by the Paw width at the largest spot.
    Barcode says DGMR
    Middle of the barcode says 48960 05200
    They may have a newer model number but that is the one I have for Angus. Recommend them highly.

    Deb Ferguson

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Gear For your Dog


Lens Guide


UV Rating



Recommended Use

Red Mirror

Blocks 99% of UVA and UVB Rays.

Allows 20% of light to pass. Very similar to sunglasses.

Impact Resistant. Mirrored lenses show more scratches than clear or smoke.

Giddy up! The Red Mirror lens is great for most dogs and is very similar to the smoke lens with a bit more style.


Blocks 99% of UVA and UVB

Allows 92% of light to pass

Impact Resistant. Offers best visibility when scratched.

For Everything except protection from brightness. Great for working, hunting or adventure dogs. Blocks UV is impact resistant and often is preferred by dogs. Great training lens, and when it gets scratched the scratches are not as visible to the dog as with other lens options.

Blue Mirror

Blocks 99% of UVA and UVB

Allows 15% of light to pass. Slightly darker than smoke and red mirror.

Impact Resistant. Mirrored lenses show more scratches than clear or smoke

DM's are rolling in! The Blue Mirror lens adds a touch of flare and is one of our darker lenses for dogs who have sensitivity to light. Perfect for use in sunny areas and for those who love that blue mirror look.

Silver Mirror

Blocks 99% of UVA and UVB

Allows 13% of light to pass. Our darkest lens.

Impact Resistant. Mirrored lenses show more scratches than clear or smoke.

STYLE! Add some flavor to the daily grind with our darkest lens, allowing only 13% of visual light to pass through, making it the best option if your dog has light sensitivity.


Blocks 99% of UVA and UVB

Allows 20% of light to pass. Very similar to sunglasses.

Impact Resistant. Offers excellent visibility when scratched.

For everything! Overall the most versatile lens. Great for dogs that are rough on their equipment as it continues to offer good visibility when scratched.F

Green Mirror

Blocks 99% of UVA and UVB

Allows 15% of light to pass. Slightly darker than smoke and red mirror.

Impact Resistant. Mirrored lenses show more scratches than clear or smoke.

The Green Mirror lens adds a touch of flare and is one of our darker lenses for dogs that need some reprieve from the suns brightness.

*VLT = Visual Light Transmission

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Rex Specs

measure your dog in two steps

  1. muzzle circumference

    Measure the circumference of your dog's muzzle where you expect the goggle to land on their nose - usually around the back of their mouth.

  2. head circumference

    Measure the head circumference where you expect the goggle to land on the forehead - typically an inch or so behind the eyes.

Watch Sizing Video
Goggle Size Head Circumference Muzzle Circumference
X-Small Less than 10.5 in Less than 6 in SHOP X-Small
Small 10.5 in - 12 in 6 in - 8 in SHOP Small
Medium 12 in - 14 in 8 in - 9in SHOP Medium
Large 14 in - 17.5 in 9 in - 11.5 in SHOP Large
X-Large Greater than 17.5 in Greater than 11.5 in SHOP X-Large
Small Wide* 12 in - 15 in 6 in - 9 in SHOP Small Wide

*Designed for dogs with a wide, flat face i.e. Boston Terriers
If your dog is between sizes, select the larger size: This will insure the most functional fit and optimal field of view.

Ear Pro Fit Graphic


Measure the circumference of your dog's head at it's largest point (just in front of the ears and under the chin). If you are between sizes, please go up in size.



2 13" - 15" SHOP Size 2
3 15" - 17.5" SHOP Size 3
4 17.5" - 21" SHOP Size 4


Measure around the dog's neck as loose or tight as you would like the collar to fit.



1 12"-14" SHOP Size 1
2 14"-16.5" SHOP Size 2
3 16.5"-19.5" SHOP Size 3
4 19.5"-24" SHOP Size 4


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