I am still somewhat new and I have noticed my first pet still has not become an adult yet and its annoying cuz I still want to breed him, is there a secret to it? What does it take to get them to an adult? Is it age? And is there any way I can accelerate the process?

"Pet Aging and Maturity
Maturity is measured in hours and comes in four categories: Eggling, Hatchling, Adolescent, and Adult.

It takes roughly 72 hours (3 Days) for a newborn Eggling to become a Hatchling.
It then takes roughly an additional 144 hours (6 Days) for a Hatchling to become an Adolescent.
It then takes an additional 18 Days for an Adolescent to become an Adult."

You can use Magical Pies (from the Cash Shop, 100 diamonds each) to age the adolescent forward by 6 days. You have to wait 3 days between each pie to use another one though.
Other than that, there's only waiting.

Link: https://www.sylestia.com/forums/?thread=18079&page=1#2 Author: Flute Time Posted: 10/17/2014 at 1:15 AM "Pet Aging and Maturity Maturity is measured in hours and comes in four categories: Eggling, Hatchling, Adolescent, and Adult. It takes roughly 72 hours (3 Days) for a newborn Eggling to become a Hatchling. It then takes roughly an additional 144 hours (6 Days) for a Hatchling to become an Adolescent. It then takes an additional 18 Days for an Adolescent to become an Adult." You can use Magical Pies (from the Cash Shop, 100 diamonds each) to age the adolescent forward by 6 days. You have to wait 3 days between each pie to use another one though. Other than that, there's only waiting.

Thank you I really appreciate it! I guess patience is really a virtue haha.