Filemaker 16 - Few things to sort out

General information for the business: Update filmmaker / scripting needed
Description of requirements/functionality: See attached screen shot.

I'm new to filmmaker, and need these problems sorting out.

I have tables, Customers, Dogs, Grooming_records.

Customers have many dogs
And dogs have many grooming records

In the example screen shot, I have a customer No 10085. the customer has 3 dogs Guinness, Vinny and Salty
Each dog has numerous grooming records.

This is what i want help with.

1. NEW DOG button - rather than adding an extra record using the portal, i want a pop up window, as the dog records have more info than displayed in the portal.

2. I can get the portal to display the customers dogs - but i also want to be able to have a button for each dogs name below the grooming records title (customer may have a maximum of 5 dogs thats why 5 buttons shown)

3. When we click one of the buttons above, it will show the grooming records for that dog. Button to change colour- so we know which is active - so that when we click on the dogs name, it displays only those dogs grooming records.

4. New Grooming Record - based on the dog selected, i want to be able to add a new grooming record for that dog - again not adding to portal as the full grooming record has more data, so prefer a pop up window.

I have all the tables, fields data and names if wanted.

Happy for who ever does this to quickly show me how to do it on a simple database, and show me how to implement into my system.

Any further info, please ask.
Extra notes:

Just added screen shot.
Grooming records portal is showing all dogs grooming records - this is a mistake