"PackingSlip" is the key concept to hold on to here. You have one NVD for an entire shipment of animals and so one NVD lists mulitple animals. What you need are Two tables linked in a relationship:
NVD::__pkNVD_ID = Animals::_fkNVD_ID
With that relationship you can put a portal to Animals on your NVD layout. When you receive a new shipment of animals, create a new record in NVD for it and list each animal in the portal to Animals.
Now you can get your summary report to work if you base it on the Animals layout instead of NVD.
See this tutorial on Summary Reports: Creating Filemaker Pro summary reports--Tutorial
Thanks for the help, i think im getting closer.
However if i base the Report off the Animals Layout instead of NVD then I have 4500 lines of data within the report. A line for each animal,
instead of a line of data for each NVD within each Type. What am i missing here.
Thanks again for helping me through this.
Take a closer look at end of the tutorial for summary reports. By removing the body layout part and replacing it with a sub summary layout part, you can get one row of data for each sorted group of animal records.