Can you give 6 week old bunnies alfalfa?

There is no

such thing as providing too much hay to any rabbit, regardless of

age. However, alfalfa hay is too high in protein for adult rabbits

and should be reserved only for babies under 6 months. A better

alternative for adult rabbits is timothy hay. Keep an ample supply

of hay readily available to your rabbit at all times. It provides

necessary fiber to your rabbit's diet and aids in digestion, and is

something healthy for your rabbit to chew when it gets the urge to

nibble.