1- Walk near Flight Club to look for sheep
Astrid: "Hmm... Where could they be?
Oh! There they are! Why don't you gather them up for me?"
2- Find all the sheep at the Training Grounds
Astrid: "Four down, sixteen more to go! I'll gather them here by the Thunder Run Racing as you find them.
I bet Ruffnut and Tuffnut let some loose at the school, too. Can you search for them?"
3- Find 4 racing sheep at the school
Astrid: "Great job!
Let's search at the top of the school caldera. Find 4 more sheep at the Lookout!"
4- Find 4 sheep at the Lookout
Astrid: "Wow, you have some eagle eyes!
I bet Ruffnut would have wanted to 'return the sheep to the wild'. Let's check the Wilderness for 4 more sheep."
5- Find 4 sheep at the Wilderness
Astrid: "I have to admit it. You're pretty amazing.
They wouldn't have taken the sheep all the way to Berk, would they? Let's check Berk for 4 more sheep."
6- Find 4 sheep at Berk
Astrid: "That's all of them. Come back to me!"
7- Come back to Astrid at the Training Grounds
Astrid: "I feel like you should reap the benefits of all your hard work. Get into the Thunder Run Racing and keep an eye for the racing sheep! You can pick them up for a short burst of speed."
8- Race in Thunder Run Racing
Astrid: "Thank you so much for helping me out, [Your Viking's Name]. I hope you enjoy the new races! I'll give you some sheep as a reward. Open your inventory, tap on the sheep and claim them for your farm!"