Mac likes to compete in dog shows. he has an inflated sense of his own importance. Mac dislikes some of the things Cleo, Clifford, and T-Bone like for example nose the can. He thinks it is too noisy. He would do anything for a tummy-yummy. In the episode "Promises, Promises" Mac was mad with Jetta for not keeping her promise to take Emily Elizabeth to the coral cave, Jetta tries to make Mac feel better with a tummy-yummy. Mac comes to get the the tummy-yummy and smiles. When Mac gets the tummy-yummy he goes back to being mad. Also in the episode "Teacher's Pet" Mac wouldn't do any of the tricks his teacher at dog school told him to do to unless he got a tummy-yummy for it. At the end of the episode his teacher even gave him a "tricks for treats" award.