Tube feeding

[jbake]

Hey there peeps. I need help on figuring out what feeding tube catheter size I need for my severely cross beaked chick. Its a month old about and looks to be an Easter egger. I think from the opening of its mouth to the gullet its maybe 5 inches unless I'm way off his neck just seems longer than most.
Thank you!!!!

 

[Pyxis]

@casportpony what size would you recommend? 18 fr?