For me personally, I don’t like to encourage people to convince their parents for pets that the parents don’t want. Unless you have some financial independence which means you can afford the housing and vet bills (with a little help). Knowing my parents, they liked pets, but weren’t pet crazy so my concern is with similar parents who are willing to help pay for vet bills, but have a different opinion than you of when an animal needs to see a vet, and when it’s worth spending the money.

Do you have the accommodation for a second rabbit? The space, the money for food? I’m assuming you’re planning on bonding them? If they’re unable to be bonded, do you have the means to keep two rabbits separate permanently? Make sure that you have answers for all of these questions before putting it to your parents. They need to know that you have planned things out well for any situation.

Otherwise, in terms of arguments for a second bunny, basically the companionship for your first bunny once they are bonded. It is very rewarding having a bonded pair, and it’s great for them to have a snuggle buddy and someone to get into mischief with.

Azerane makes a valid point. Yes, there are benefits to getting a second bunny (assuming you intend to bond). Bonded pairs always have a friend with them, even when no humans are home. They can comfort each other during times of stress and get into trouble together during times of play. Some bunnies do very, very well with a companion. Others, do not. It depends on the bunnies involved.

What you need to ask yourself though is what are you plans if bunny #1 and bunny #2 do not get along? Are you prepared to house them separately indefinitely? If not, then getting a second bunny might not be a good idea.

Having two bunnies living as a bonded pair does cut down on day-to-day costs (excluding added food and vet bill expenses). You don’t need to buy two of everything, for example. If they can’t live together though, then you do have to buy two of everything. So that’s something to keep in mind. Also, both bunnies need to spayed/neutered, otherwise they cannot be bonded. Individuals of the same sex will fight and a boy and girl will make babies (of course). So there is the added expense of having that done if they haven’t been already (Hint: adopt from a shelter, they typically do that before putting bunnies up for adoption).