Thanks! This helps a lot. I've just got the game yesterday and I'm loving it! My French Bulldog Patches is already on level 12 so I'll hopefully unlock this soon!
I will and the question of Dany Granatina, the reason the hearts get stuck on level 10, is because you can only use a certain amount of hearts each day.
I already have 3 pets and would like to get four, the problem is when i try to become friends it doesent work, can you make a video of how to get four pets??