Something on my guinea pig's foot

[AndrewVP]

One of my guinea pigs has had issues with a growth on his foot in the past and here it is again. The other guinea pig I have has never had this issue. It can be clipped off but keeps coming back. At first, I thought perhaps it was just poop that gets stuck to his foot but it happens a little too often for me to think that anymore. I've seen some answers online regarding foot spurs, bumblefoot, etc. What do people here think?

 

[Piggies&buns]

The pictures arent very clear but it looks to be a foot spur. They are best left alone if they aren’t getting caught in bedding. If it does need to be dealt with then please see a vet rather than cutting it yourself.
Bumblefoot is open wounds and sores on the foot pad itself.