Now that both my horses are eating more hay than pasture my mare's manure has started to look more like cow paddys. There are some balls mixed in with it but it is nothing like it was when they were on more pasture than hay (during the summer). The hay is bermuda and very green, both horses get the same hay, no grain, just pasture and hay. Yes they have been wormed and are checked regularly so....does switching to more hay cause this? My gelding has had no change in his manure. Other than the change in her manure my mare acts like herself. Thanks for the help!