I thought at first they were bot fly eggs but they haven't been getting bigger or disappearing, there's just been more of them. They are rock hard little lumps all over his chest, shoulders and neck. I don't know if he's always had them or if they just appeared, he just shed out all at once in about a week. They've been pretty much the same for about 3 weeks now. Some of them are huge, like the size of small marbles. They don't seem to be painful, I pinched and poked a few of the bigger ones and he didn't even flick an ear. Anyone know what they are and how to get rid of them? He's the only horse on the property with these lumps.