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2021 March Muttness - Header Image 1

Shelters from across the United States compete to raise the most for the pets in their care!

The Humane Society of Southern Arizona (HSSA) along with 31 amazing animal shelters across the nation are back to compete in a virtual fundraiser where you can support animal shelters and groups throughout the country!

How can you help? Scroll down to support a participating shelter! 


It's time to start the Muttness with the Thrilling Thirty-Two! Give now to get your favorite shelter through to the next playoff. We will update the bracket at 10 a.m., 1 p.m., 4 p.m., 7 p.m., 10 p.m. EST. Check the bracket daily to see new totals and be sure to share March Muttness™!

DONATE TO HELP YOUR FAVORITE SHELTERS! The Thrilling Thirty-Two starts March 4th at 10 a.m. EST and continues until March 6th at 10 p.m. EST. Support your shelter to help homeless pets across the country.

Who will make it to the Sensational Sixteen? DONATE NOW to ensure your favorites make it through to the next bracket!

Donate to your favorite shelter to help each raise money to help support their mission as they compete in our March Muttness™ championship brackets.

We will update the brackets until two champions emerge for the final showdown in March Muttness™!


We will update the bracket at 10 a.m., 1 p.m., 4 p.m., 7 p.m., 10 p.m. EST for each shelter's total donations so you can check in to see how your favorite shelter is doing in the competition so stay tuned!

Last year March Muttness™ raised thousands of dollars participating shelters! You can view the March Muttness™ 2020 coverage here.

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👇 Click the shelter logo below to DONATE NOW 👇