Separated by glass from most household pets
Boesemani rainbowfish are good with other pets at home largely because they never actually meet them. A dog, a cat, or a rabbit lives on the other side of aquarium glass, and the boesemani's peaceful, fast-swimming nature means it ignores movement in the room once it is settled. The question is therefore less about the fish's temperament toward your other animals and more about how those animals behave toward a tank full of bright, darting food-shaped movement, and whether your setup is built to keep that interest harmless.
Cats, dogs, and the physical risks to manage
A cat is the household pet most likely to trouble a boesemani tank. Cats pat at swimming fish, sit on warm lids, and will fish through any open gap around filter pipes, so a close-fitting, weight-bearing lid is essential rather than optional. A large or boisterous dog creates a different risk, bumping the stand during play or jumping up at movement, which calls for a solid cabinet and a tank position out of the main charging route through the room. Small pets in cages nearby cause the fish no concern at all. Birds should not be allowed to perch above an open tank during maintenance, for the fish's safety and the bird's.
Choosing tankmates a boesemani can live with
Inside the aquarium, boesemani rainbowfish mix well with peaceful fish of similar size and energy. Other rainbowfish, larger tetras, peaceful barbs that are not known nippers, corydoras, and calm loaches all commonly share their warm water happily. Problems come from two directions. Very small, slow tankmates and tiny fry can be eaten by a four-inch adult boesemani, and aggressive or fin-nipping species chase and stress a school that prefers to keep the peace. Boesemani males spar lightly among themselves, which is normal display, but that is no reason to add genuinely combative fish to the same water.
Introducing a new pet or new tankmate calmly
Change is what unsettles a boesemani school, not the mere presence of another animal. When a new dog or cat arrives, expect the fish to hide more for a few days and keep room routines predictable, feeding at the usual times and leaving the lid closed. When a new tankmate arrives, quarantine it first if you can, add it with the lights low, and watch feeding for a week to confirm the newcomer eats and nobody is being chased off food. Rearranging a few plants or ornaments at introduction can break up established sight lines and reduce squabbles over the best swimming lane.
Warning signs the mix is not working
Inside the tank, persistent chasing, torn fins, or one fish always hiding at the filter means the combination, not the boesemani, needs changing. Outside the tank, a cat that has learned to lift a lid corner or a dog that repeatedly lunges at the glass needs a physical fix, such as a latched lid or a relocated tank, rather than repeated scolding. If several boesemanis stop eating, clamp their fins, or develop spots after a stressful change, test the water and seek aquatic advice promptly, because stress and poor water together are what usually turn a scare into illness.
Peaceful fish in a well-secured tank
Boesemani rainbowfish fit multi-pet homes well when the aquarium is treated as secure furniture: lidded, sturdy, and stocked with companions their own size and speed. Manage the cat's access and the dog's exuberance, and the fish will simply become part of the household scenery for everyone. If the whole setup is ever rehomed, KinsLe Transferrable Profiles lets the receiving keeper see which tankmates the boesemanis lived with peacefully and how the school was fed, so a working combination is not broken by guesswork.