TikTok, the world’s leading global destination for short-form mobile video, has partnered with UK pet welfare charity Blue Cross for a fundraising initiative to celebrate the nation’s furry friends.

The #PetBFF hashtag challenge, which has so far received over 500 billion views, invited the TikTok community to create and share videos featuring their Best Friends Forever — their pets. For each of the 10,000+ videos made in the UK, TikTok donated £1 to Blue Cross, helping to support the charity’s work with sick, injured and homeless pets.

See some of the best videos below!