Here is the full list of all 9 Pupper park achievements.
Grab a frog.
Finish a game of football.
Finish a game of "korfbal".
Knock out another dog.
Collect 5 bones before the park closes.
Collect 10 bones before the park closes.
Collect 15 bones before the park closes.
Collect 20 bones before the park closes.
Collect your first bone.