The main diet of rabbits is hay. But with the advent of the first grass, I try to diversify their diet. Here the balance is important. Do not drastically change the diet of animals and include exclusively green food in it. You can also give tree branches. It is both a source of vitamins and a way to grind teeth.
I also want to note that when you start giving rabbits more green food, they start drinking less. This is normal. However, water should always be available.
You can treat the rabbit with dandelions. They love them very much. Squirrels too 🐾