Spinach is one of the vegetables that I recommend that you do not give it to your rabbit at all, so because it contains vitamin C, calcium and iron, your rabbit will not benefit from these elements at all, but these elements may turn into pathogens for your rabbit
Can Rabbits Eat Spinach?
Rabbit can eat spinach, but in a very small amount, but I do not advise you to give your rabbit spinach, because although it contains vitamin C, which the rabbit cannot produce on its own, it needs an external source and also contains calcium and iron, which are required for building bones, but it also contains a high percentage of Oxalates, oxalates are natural chemicals that are present in spinach in a large amount. Oxalates may cause your rabbit to have great pain when urinating, also oxalates prevent the absorption of calcium and iron in spinach, so your rabbit will not benefit from these two important elements for building and strengthening bones.