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There are local, national, and global organizations that work to protect and help all kinds of animals. Larger organizations like the Wildlife Conservation Society, African Wildlife Foundation, Best Friends Animal Society, and other nonprofits make it easy to donate to their cause online. To make a difference in your own community, donate to a local organization, such as the Humane Society. For instance, make a donation to the Palo Alto Humane Society, an organization in Northern California that aims to keep animals out of shelters. Find their website here: https://www.paloaltohumane.org/ Most organizations allow you to make a one-time donation or recurring donations in an amount you choose. If you donate to a nonprofit or charity, it's usually tax-deductible. Your support could help animals in shelters find homes, fund spay/neuter programs, provide medicine for animals with special conditions, and much more. See if your local shelter runs GoFundMe campaigns or requests sponsors on Facebook or other social media sites. For example, sponsor a horse, pig, goat, bird, cat, or dog through the Best Friends Animal Sanctuary (https://bestfriends.org/donate/sponsor-animal). You can also support an animal in distress by donating to the Palo Alto Humane Society's pet help program or animal rescue fund. Check their website or Facebook page (https://www.facebook.com/paloaltohumane/) to see which animals currently need help. To sponsor a dog awaiting adoption at Villalobos Rescue Center in New Orleans, LA, go to https://www.vrcpitbull.com/how-you-can-help/sponsor-a-dog/. Find a cause you can support, like protecting an endangered species or stopping dog breed discrimination. Best Friends has a handy list of petitions sorted by state on their site: https://support.bestfriends.org/site/SPageServer/?pagename=index. The World Wildlife Fund has national and worldwide petitions you can support: https://support.worldwildlife.org/site/SPageServer?pagename=can_actions. If you follow animal organizations on social media, you can repost or retweet their content to show support. Your followers and social media circle will see it and possibly share it themselves. Make sure the content you share is accurate so you're spreading correct information.
Make a donation to an animal organization. Sponsor an animal in need online. Sign a petition to support animal causes you care about. Use social media to spread awareness for animal organizations.