Here is the full list of all 21 Dr. Cares - there are Pet Rescue 911 achievements.
You collected all trophies!
You played with 50 pets!
Groom 50 pets.
You bought all the upgrades in the game!
You bought all gifts for Newton!
You watched the epilogue and completed the game!
You completed the last chapter!
You reached three stars on all levels!
You found all the mice in the game!
You completed each minigame with the best score!
You completed the fifth chapter!
You completed the fourth chapter!
Newton entertained 100 pets!
You scored a total of 500,000 points!
You completed the third chapter!
You healed 500 animals!
You completed the second chapter!
You completed the first chapter!
You earned 25 'Purrfect' combos!
You have finished your first day!
You healed you first pet!