General rule of thumb is that most animals that don’t eat meat have suitable droppings to be used for fertilizer. Just remember, what goes in, must come out. Whatever your bunny eats will make up the composition of your fertilizer. Alfalfa is pretty great as an ammendment. Rabbits who process that make it more bioavalible. I have no idea what the ratio is but I would base it off what they eat. For instance, if it’s a half cup of alfalfa pellets, look up the feed ratio for that and so on.

They eat foods high in nitrogen and anything processed by an animal has phosphorus as a byproduct, less so for ruminate, which rabbits are not. So you’ll need to add in potassium to hit the big 3. There will be little risk of burning because rabbit pellets aren’t “hot.”

You could even take it a step further and use it to make wormcastings and have something truly magical.

Those are all high nitrogen. Sounds like a very good fertilizer to me. I wouldn’t use it for a tea. That much nitrogen will attract everything, both good and bad.