Yikes, why did it cost so much?! Did they have to sedate the dog and surgically remove the thing?
I've heard horror stories of foxtails up the nose, etc., so I know it can be an issue. But I'm not concerned about the way we play it. For example, I live in a neighborhood where, frankly, lawn care is not a priority. There are foxtail jungles landscaping at least three houses down my block. We march right by them when we're out on regular walks, and if I tried to avoid every clump of the weed in my neighborhood, we'd be tracing hieroglyphics up and down the street. Heh.
The parks that we continue going to are far from foxtail-free, but the layout and general maintenance efforts make it possible to not be too troubled by them. That is NOT the case at this other park that we basically have to abandon over the summer because it becomes completely overrun by weeds of all kinds.
This was just our regular vet. I haven't ruled out a specialist, as I'd love to get more customized answers, someday.