Please realize that it takes under a minute for a male to impregnate a female.
You will not be able to separate them in time if they take an opportunity to be together. Please keep them completely separate with no way to get at each other.
As Monkeybun mentioned, cage bars are not enough. They need two separate spaces at all times to avoid the risk of pregnancy.
You need to understand something very serious… If you do not plan on getting them spayed and neutered, then your two bunnies will have to be separated for the rest of their lives. Rabbits that receive proper food and care can live up to 12 years.
They will never be able to play together or be in the same space together without a high risk of sexual contact. This is non-negotiable if you want to avoid pregnancy. Rabbits can have up to thirteen litters in a year. A quick mistake now can mean a nightmare later on if your female gets pregnant by accident.
I know you’re having fun with your bunnies, and you should. They’re wonderful pets and can bring endless joy. But there are some things that are set in stone about rabbit care. One of them is that they need hay at all times, without exception. Another is that you cannot keep intact males and females together if you want to avoid breeding.
Please take this advice seriously, for the health of your pets. It’s crucial that you keep them separate as long as they remain intact (not spayed or neutered). If you don’t end up getting them fixed, then the only way to avoid pregnancy is to keep them away from each other forever.
You are not without options, however. There are things you can do about this situation. Two rabbits can live in the same house together without coming in contact with each other. If you choose this option, you’ll have to be very careful about keeping them apart when they are out of their cages.
Another option is saving up enough money over a period of time to get at least one of them fixed. It is expensive, but it can prevent much heartache down the road… accidental litters, dangerous pregnancies, and reproductive cancer. Intact (unspayed) female rabbits have an 85% chance of getting uterin cancer by the time they reach four-years old.
Another option, albeit a sadder one, is to rehome one of your rabbits and keep only one of them. This is something I’m sure you’d only want to do as a last resort.
I’m very glad you’re here with us! This site and the wonderful friends I’ve made here have made a difference in my life for the better. We will do the best we can to help you care for your rabbits.