The latest edition in the Power Ponies series is one that everypony's been waiting for. Crystalline Calamity.
The tale is focused around the Mane-iac attempting to seize a crystal with an otherworldly power tucked away inside. After grabbing the crystal from its' pedestal, she is confronted by the Power Ponies once more.
She tries activating the crystal to see what it does, seeing as there's nothing better for her to do in this situation, but the crystal has a very... intriguing power once it's used.
Now the 7 of them have wound up in Equestria, all of them youthened by the aftermath of the crystal's power. Yet for some reason, Mane-iac came out as a filly, whilst the other ponies came out as foals.
Lost, frightened, and with nowhere to go, Spike brings the 7 of them to Princess Twilight, who is more than happy to care for them in their time of need.
The picture comes from an artist called Beavernator. He's pretty famous for his foal pictures and foal comics. Check him out when you have the time, though you might just see him on Equestria Daily's comic panel if you're lucky.