for real? I was just joking around but that is crazy.
Dog fighting, dog racing, dog showing, chicken/fowl showing, cock fighting, pigeon showing, pigeon racing, cattle showing, horse showing, and horse racing all have been known to use steroids.
Trenbolone is a veterinary steroid. Winstrol started out as a veterinary steroid. (Bodybuilders would make horse whinny sounds, and tap their right foot as a joke. Apocryphally that is how winstrol got the slang name "winnie")