Belgian Malinois with kids and other pets
A well-bred, well-socialised Malinois can live successfully alongside children and other animals — plenty do — but the breed's size, drive and herding instincts mean this takes more deliberate management than it might with a lower-drive companion breed.
Malinois and children
Herding-breed instincts can show up around fast-moving, high-pitched, unpredictable children as nipping at heels, circling, or attempts to "herd" — behaviours rooted in instinct rather than aggression, but which still need active management, since a young child can't reliably read or respond to a dog's warning signals. Supervision during all interactions, especially with unfamiliar children, and teaching kids calm, respectful handling (no ear or tail pulling, no surprise hugs from behind) matters as much as training the dog.
A Malinois raised around calm, respectful children from puppyhood, with structured rather than chaotic play, tends to form a genuinely protective, gentle bond with them. The risk generally isn't the breed being "bad with kids" — it's an under-exercised, under-socialised dog combined with unsupervised, unstructured interaction, which is a recipe for problems with almost any dog breed.
Malinois and other dogs
Properly socialised Malinois generally do fine with other dogs, though the breed's intensity in play can overwhelm a more laid-back or smaller dog if not moderated. Introductions on neutral ground, on leash initially, and short supervised sessions before longer unsupervised time together tend to go better than an unplanned first meeting at home, where territorial dynamics can complicate things.
Malinois and cats or small pets
This is where real prey drive is most likely to surface, particularly with an adult dog meeting a cat for the first time rather than growing up together. A slow, structured introduction — separated by a barrier initially, controlled short sessions on leash, rewarding calm behaviour around the other animal — gives the best chance of a peaceful outcome. Some individual Malinois, especially from strong working lines, may never be fully trustworthy off-leash around cats or small animals regardless of training, and that's worth accepting and managing rather than assuming training will eventually eliminate the instinct entirely.
Never leave it to chance
Whatever the combination — children, dogs, cats — unsupervised time together shouldn't happen until there's a real, tested track record of calm behaviour, and even then, management (baby gates, separate spaces when unsupervised) is a sensible permanent habit rather than a temporary phase to grow out of.