So today I went out onto entry express and download my event history into a spreadsheet.
Since I have only been in the game 4 years, I was able to note how many birds my dog picked up based on how we performed and how much money I paid in entries.
So, right now, the cost per bird that we picked up, over the 11 FTs is $23.86
The worst trial, (1) bird $89.50 / bird
The best trial, (8) birds $11.81 / bird
The moral of the story, finish more series and you pay less per bird