I am having trouble understanding DD Sherlock's exact problem. Is DR Jane saying that a foxtail spiky plant is embedded inside his paw? 
We are having the same issue. The doctor at the vet thinks there is a strong possibility he has a foxtail in his foot. This looks very much like the same problem he had a couple of months ago I referred to as the "whatever". The other vet, our regular vet, didn't think that was foxtail. When we saw this new thing, that looked like the old one only not as bad, we figured it was the same. We began with the paw soaks & expected the vet to give Sherlock an antibiotic to take, not to need surgery.
The problem with foxtails is the only way to know for sure is to go in and look for them. So we scheduled the exploratory surgery.
This morning we chickened out and canceled. We are doing the paw soaks & have him on antibiotics & praying it isn't a foxtail. We have a follow up appointment for Tuesday afternoon.
If Sherlock were in any kind of pain or limping we wouldn't hesitate, but he isn't & it looks 100% better today after the antibiotic shot yesterday.