We also have 2 cats, they had supervised introductions and visits until we were absolutely sure that they were used to each other. The cats were more afraid of the buns though.
I would just be careful with grown cats and baby buns. We were introduced to bunnys because our cat stole one and brought it in to kill, luckily we rescued him. Thats how we got our first bun, now we have 7 including the forster buns.
The cats dont bother any of them.