What is your suggestion?:
Provide the player a reward upon getting a duplicate pet.
Is this in OSRS?:
No, as far as I know.
Has this suggestion been accepted already?:
No, as far as I know.
How would this benefit Alora?:
In the vast majority of cases, getting a duplicate pet is a totally meaningless event. People shrug and move on. With this change, the player would have something else to show for their RNG.
Implementation Suggestion
A neutral solution could be a static amount of GP or an XP Lamp reward.