Fertilizer - Horse vs Cow

[FloridaBamboo]

I read that horse fert is better than cow fert. I know from experience that cow fert always has a ton of weed seed. I started using mushroom fert. It has no weed seeds. Does anyone have experience in the difference between horse and cow ferts?

[dependable]

Horse manure can be weedy too. It works fine, sometimes horse manure contains a lot of wood or straw bedding that raises its carbon/nitrogen level pretty high. Both types of manure benefit from aging/composting.

[canadianplant]

Can I throw in another contender? Turkey "pellets" or manure, properly composted is supposed to be the best you can use to what ive read.