Wallaroos are larger than wallabies but smaller than kangaroos. Like kangaroos, they stand on their back legs, eat with their front paws, and carry babies in their pouch. The common grey wallaroo is Macropus robustus and the red wallaroo is Macropus cervenus.
Wallaroos are stocky and powerful, with shaggy fur and bare black snouts. Males can weigh anywhere between 50 and 100 pounds, while females are more likely to be 40 to 50 pounds.
Both are reported to live 15 to 20 years.
Wallaroos are shy and it takes time to tame them. However, they are curious and will bond quite nicely with their owners if well raised (while still nursing), socialized, and treated positively. They can be friendly, playful, and affectionate, but also mischevious, albeit entertaining. They can be taught to understand "no", but they need firm corrections and never physical punishment.
On the downside, that mischievousness may lead to damage if you're not supervising them properly. In addition, some species are nocturnal and won't be active during the day when you want to interact.
Wallaroos are herbivores, naturally grazing on grasses and shrubs in their natural environment. In captivity, give them a constant supply of fresh, good quality hay (such as Bermuda or ryegrass). Ideally, provide a grass pasture for grazing (securely fenced).
You can also feed them a commercial kangaroo/wallaby diet (e.g. Mazuri). Offer a variety of fresh vegetables as treats. A vitamin E and selenium supplement is also recommended.
If you get a baby wallaroo, you'll need to bottle feed with formula every few hours until they can eat on their own.
Keep in mind that this marsupial is from the wild pastures of Australia and a jumper, so you'll need a large yard, pen, or pasture that is secure and fenced for them to run and exercise. The fence should be at least 6 feet tall, and your wallaroo needs 2,000 feet of space. The fence also keeps out unwelcome animals. Cats can be a threat to wallaroos due to the spread of toxoplasmosis. If your wallaroo comes across cat waste that's infected, he can become fatally ill quickly.
If you're considering keeping a wallaroo in the house, keep in mind that these animals won't use a litter box, so you'll need diapers on hand. You'll also need to remove any fragile or breakable objects because the wallaroo is like a bull in a china shop given its penchant for jumping. Wallaroos also require a temperature ranging from 40 and 80 degrees F, so you might need additional provisions for heating or cooling.
Bear in mind that wallaroos are expensive--expect to pay between $1,000 and $4,000 to purchase your pet plus an additional investment if you have to set up fencing. Food adds another $200 and $400 per month.