In the book "Hoot" by Carl Hiaasen, the descriptions of Kalo the dog trainer and the reptile wrangler, Muckle, both have a somewhat negative and ominous tone.
Kalo the dog trainer is described as a large, muscular man with a shaved head and a neck like a tree trunk. He wears black leather and chains and has a pair of fierce-looking Rottweilers that he uses to intimidate people. The tone of the description suggests that Kalo is an intimidating and somewhat scary figure. He is portrayed as a bully who uses his dogs to intimidate and control people.
Similarly, Muckle the reptile wrangler is described as a gruff and unpleasant man with a face like a bulldog. He is said to smell like a mixture of reptile musk and cigarette smoke. The tone of the description suggests that Muckle is an unpleasant and untrustworthy character. He is portrayed as someone who is willing to do whatever it takes to catch and sell the rare and endangered burrowing owls, even if it means breaking the law.
Overall, the effect of these descriptions is to create tension and suspense in the story. The reader is made to feel uneasy and uncertain about the intentions of these characters, which adds to the overall sense of danger and threat in the book.