How to pre-fill a form based on a entity detail page

[tloder]

In my app, I have a dog list, dog detail, walk form, walk list, walk detail, and walk inline views.

The image below is the dog detail page. I have added an action to this page, the + icon next to the dog name. This links to the walk form where I can select the name of a dog from a list. I would like the action to behave the way it does when I tap the word “New” in the Walk inline history. Tapping new brings up the same exact view (walk form) but prefills the dog field with the correct dog name depending on which dog detail page I was previously on. This was configured for me when I started building the app, I can’t figure out why the New action behaves differently than the + action