Homebrew
Keen Smell. Carnotaurus has advantage on Wisdom (Perception) checks that involve smell.
Charge. If the carnotaurus moves at least 25 feet straight toward a creature and then hits it with a slam attack on the same turn, that target must succeed on a DC 13 Strenth saving throw or be knocked prone. If the target is prone, the carnotaurus can make one bite attack against it as a bonus action.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.
Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage.
Forest, Grassland, Jungle