I think your probably right.
My Doris had some sort of heat event or stroke in July. His comb was purple for at least a week.
He broke his beak a while prior to that. I trimmed the bottom to help him out, but the upper was obviously causing him discomfort, so he wasn't eating or drinking much. I believe he got dehydrated.
He is doing some better now, but he is not his spunky, randy self. The old girls are still hanging with him, but the younger ones have moved on.
I hope that, that has taught him a lesson about loyalty and cradle robbing, but that's probably too much to hope for.