Fecal, definitely. Don't wait too long. Ours was either laying or standing in the same place all day. Wouldn't turn his head to look at us when we called him. Had to force him to come eat...and that has never been a problem. Our main problem is liver flukes and the ttreatment is weakening his immunity, etc. and a few other complications. But a fecal and blood test will show if there is something wrong hopefully. Our neighbors bull was acting depressed and under the weather, his turned out to be coccidiosis, a disease that birds spread when they poop on their food and they then eat the food. Shot cleared it up. Good luck! The do get depressed. But if you think it's more than that then it probably is. Also, another sign they have something wrong is if there nose is hot and dry. It should be moist.