Hi! So I was petting my 5 week old Nigerian Dwarf buckling the other day and I noticed a lump under the skin on his right shoulder. He wouldn't hold still long enough for me to tell if it hurt or if he was just wondering why I wasn't petting him. The lump is about a centimeter across, but it seems like it may slowly be getting larger. I don't know what it is or if I should be concerned about it. Any thoughts or ideas are greatly appreciated. Thanks!