Is there a product on the market that will block foxtails from entering a dog's nose? It would need to be a mask of some kind.

I've seen mesh mussels...

Yes the mesh muzzels are good if the foxtails cannot be removed...

You also need to be wary of seeds working their way into the dogs skin, sometimes you can't even see them until it becomes infected.

Are they in your backyard or somewhere you walk your dog regularly?

There is an inhalation mask available for dogs. Does anyone know of a supplier?

I live in California. My yard is free of foxtails, but everewhere else has them.

The only mesh ones I can find have open ends, you might be able to modify them...
I will keep searching though...

Mesh Dog Muzzle (http://www.gundogsonline.com/misc-dog-supplies/mesh-dog-muzzle.html)

Here you go, this one is perfect...
Specifically designed for foxtails...
I think you have to buy the patent for it :confused: but you could use the basic design for a diy one.

Inhalation net for dogs - Patent 6832581 (http://www.freepatentsonline.com/6832581.html)

Thank you. I also saw the patent. I am attempting to see if the patent ever went into production. And where they can be purchased.

Yes, I have never seen them in stores anywhere but I will cross my fingers for you!
It looks like a great idea.