Here Kitty, Kitty

Here Kitty, Kitty is a side quest in Fallout 4.

Detailed walkthrough
As the Sole Survivor enters Vault 81, Ashes (the cat owned by Erin Combes), runs out of the Vault and into the wastes. Upon seeing this, residents of the Vault will comment on it, directing the Sole Survivor to speak with Erin, who is distraught upon learning of the news. She explains that Ashes scratched her, in which she yelled at him to go away, and has no idea where he went afterwards.

Ashes can be found east of the Vault towards the Chestnut Hillock Reservoir, sitting on the docks, or on the opposite side of the reservoir, near a skeleton in the wheelchair. He can be killed or spoken to; if he is killed the quest is failed. If one chooses to talk to him, he will independently run back to the Vault.

Once he is back in the Vault, talk to Erin again to receive a reward. The initial reward is a fusion core. Speech checks can change the reward into Erin's favorite kickball, her old teddy bear, or, lastly, the heirloom she received from her mother. If one of these rewards are offered, it is impossible to receive the original fusion core.

Bugs

 * Sometimes the option to send Ashes home might not show up. One known cause is if patch 1.3 was installed after entering Vault 81, but before starting this quest.
 * If you cannot issue the return home command, use the console commands and . These will allow Ashes to be interacted with and the quest to be completed normally.
 * Alternatively, if you have changed the default key for the "Action" command, changing it back to "E" temporarily will sometimes allow you to send Ashes home.
 * If neither of these work, use the console command . This should advance the quest to "Talk to Erin", and make Ashes run home.
 * The quest can be completed by reverting to a previous version of the game. This requires disconnecting your console from the network and installing Fallout 4 from a disc without allowing installation of patch 1.3.
 * When you get Ashes home and talk to Erin, she may only say generic dialogue and not reward you.
 * Hearing about the quest from a NPC after accepting the quest from Erin will result in the quest telling you that you need to speak to Erin, marking her as the quest objective resulting in her only responding as though you had spoken to her and the cat not appearing at the dock.
 * It is possible to fix this bug by using the console commands and, then speaking to Erin. Another possible fix is to use , and  while in the Vault. Ashes will try to return to Chestnut Hillock Reservoir, and one can then use . The player should tell Ashes to go home, and he will run to Erin, completing the quest.
 * Another option is when you return Ashes, stand there and let Erin talk to Ashes, then after she finishes talking the quest might be completed.
 * Ashes may not appear next to Erin when returned even though she talks to it normally and the quest is marked as complete.
 * Even if all three speech checks are passed for the maximum reward, only the teddy bear will be rewarded at the end of the quest.
 * It is sometimes possible to send Ashes home from a great distance while aiming through a scope.