Here is the full list of all 15 Pet idle achievements.
Congratulations! You have accumulated the fortune of 500.000 coins!
You have become an amateur pet caretaker!
One of your pets has reached level 25!
Congratulations! You won the trophy for having 8 pets!
Congratulations! You have accumulated the fortune of 100.000 coins!
Congratulations! Your house has reached the Huge House mark!
Congratulations! Your house has reached the Big House mark!
You have become a beginner pet caretaker!
Congratulations! You won the trophy for having 4 pets!
Congratulations! You won the trophy for having 2 pets!
Congratulations! Your house has reached the Medium House mark!
One of your pets has reached level 50!
One of your pets has reached level 100!
You have become a professional pet caretaker!
Congratulations! You have accumulated the fortune of 1.000.000 coins!