At stable you can rent a mount, thanks to which the duration of quests is shorter.

Stable
Mount Cost Quest time Chance for Mushroom from quest Rental time
Cow / Pig 1 Gold -10% 8% 14 days
Horse / Wolf 5 Gold -20% 7%
Tiger / Raptor 10 Gold 1 Mushroom -30% 6%
Griffin Dragon / Dragon Griffin 25 Mushroom -50% 5%

In addition, when buying Griffin Dragon / Dragon Griffin, you get some gold depending on the character's level.

You use door on the right to open pets screen.