All dogs are susceptible to aggression and harmful behavior, but with adequate training and care, Pitbulls can be as friendly and well-behaved as any other breed.
Yes tokay geckos are known to be aggressive, hard to handle, and quick to bite. You can overcome these obstacles though, most tokay geckos are ultimately harmless.
Cocker Spaniels do have a reputation for sometimes being aggressive. This is partially due to nervousness, which can make them nippy. Also, certain strains seem vulnerable to an inherited form...
