HELLLPPPPPP Fungal infection or rough housing?

Hi I'm not sure if my chin has a fungal infection or not. I have some pictures in the link below. There's some discoloration in the whiskers of one and now I'm noticing a few have broken off. This chin is definitely the more passive of the two but I'm worried it's a fungal infection. I don't see any hair loss in the surrounding area and no pink areas or patchy skin. The only indications I have are the discolored spots on his whiskers and some that have broken off. Please help.

https://imgur.com/gallery/3iDCr4R