Grand Theft Auto V: Chop [Walkthrough] [1080p 60]

Lamar brings his dog, Chop, to help with this mission. Franklin and Lamar have to find another gang member. Lamar escalates things which causes the perpetrator to run away, causing the 2 to chase the guy down. Chop helps you find the guy.
After finding the guy, he's loaded into Lamar's van, Lamar makes a call, causing the call to be traced. Franklin has to get D out early as a result

Franklin tells Lamar he needs to train Chop. The game used to say to you that you could download the iFruit app on your actual phone to train Chop once he lives with Franklin. After this mission, Lamar calls you telling you that Chop will now live with you.
At least when first played I recall Franklin telling Lamar Chop needs training

As of now, Rockstar deleted the iFruit app from the Play/apple store.
I remember when I first played in 2020, the game gave me a message that I could train chop, and customize my license plates on the iFruit app