These are essentially the same as the one I have for Koda and its definitely the easiest to condition to. She got a pine cone stuck in it once when she forgot she had it on, and our biggest concerns are it getting caught while she's sniffing and not being able to pick things up. You likely won't need a custom fit, either. I hope you like it!!I am looking at a Greyhound Muzzle from here but have sent them an email about possibly doing a custom version.
Plastic Greyhound Muzzle - DMAC 200 This Muzzle is adjustable for different sizes of greyhounds, light, flexible and durable
I am thinking that this will allow for Trucker to have the most comfort and feel the least confined.