Costco

I'm about 99% sure that was not a chicken spur, probably a chicken shank or rib. Reasons:

1. Chickens feet are cut off by both old fashioned processing and mechanical chicken processing plants. Socking ie removing the feet skin followed by feet being cut off.

2. A Roosters spurs don't appear looking like spurs until they are 7+ months old and most chickens are culled in plants between 2 and 6 months old.

3. Roosters are rarely grown for meat in small farms and pretty much never in industrial chicken plants like Costco's.

I grew up on a chicken farm... Ya'll just need to cook chicken correctly if salmonella worries you lol.