Belgian Tervuren vs Cavalier King Charles Spaniel

This breed has an "arrested" predatory sequence that stops just short of the kill bite, but heavily features the "chase" and "nip" behaviors. They will instinctively nip the heels of running children, cyclists, and joggers. This is often misidentified as aggression, but it is a hardwired working trait that is extremely difficult to train out completely.

Unlike the "loves everyone" temperament of many sporting breeds, the Tervuren is naturally aloof and suspicious. Without extensive early socialization, this caution can escalate into fear-based reactivity or "sharpness" (biting out of defensive fear).

If under-exercised, Tervurens do not just lay around; they deconstruct their environment. They are prone to obsessive-compulsive behaviors like tail chasing, shadow staring, and flank sucking if their mental needs are not met.

This is a "Velcro dog" in the truest sense. They were bred to warm laps in drafty castles and have not lost this biological imperative. They cannot be left alone for standard workdays (8+ hours). Isolation leads to profound distress, destructive chewing, and incessant whining or barking.

While they are toys, they are still spaniels. They retain a prey drive that can be triggered by birds, squirrels, or butterflies. This "arrested" predatory sequence means they may suddenly bolt into traffic if not leashed, despite generally good recall.