u/DDoS-403

Hey there my fellow German Shepherd parents need some help. This is my first GSD and i could use some advice.
As soon as he (Max) turned 5.5 months old his interest in food declined.

I give him Royal Canin maxi puppy soaked in Luke warm water as per the guidance chart. He has become a picky eater , i admit few days back i used to spend 40-45 minutes trying to feed him . Giving him food on his tray, floor challenge and hand feeding him ( i know thats a bad move)

As i researched i came to know about creating discipline, picking bowl after 10 minutes after he refuse to eat. I have started doing it and yes did got some results. He refused to eat in the morning yesterday i picked up the bowl after 10 minutes. Skipped his mid day Yogurt and at night around 7:30pm he ate food , cleaned out the bowl . Also for now i have suspended all treats.

Few things i need to ask:

1. How do you keep yourself emotionally strong during this when you know your pup is hungry but you need to create a discipline
2. He used to have 500g yogurt in mid day because where i live it’s very hot . How can i introduce it back so it doesn’t hinder his normal meals
3. I used to serve his breakfast right after his morning walk and poop right around 5:40am . Thoughts on moving breakfast to 7:00am when he is more hungry or cooled down?

Any further advice would be a great help!