Re: When will my Sims Dog age up?
@GTgaming90 You are correct to think that at 24 days your dog should be ready to become an elder. If your pet has not aged up by the time you read this message you could buy an "Age-Up" treat at the vet clinic.
Source:
The Sims 4 Cats and Dogs
Adopting, Training, and Caring for Pets
https://www.carls-sims-4-guide.com/expansionpacks/pets/cats-dogs.php
