How is she doing now? Bloat is a very serious condition and a true medical emergency. It also tends to progress very rapidly and cause extreme pain. My understanding is that the whole abdomen can become distended and hard. Has she eaten at all since her symptoms started? Has she shown other signs of pain, such as grinding her teeth?
Here are some articles about bloat:
http://www.medirabbit.com/EN/GI_diseases/Mechanical_diseases/bloat.htm
http://www.medirabbit.com/EN/GI_diseases/Bloat/Bloat_ena.htm
My suspicion is that it is more likely gas, or some other gastric discomfort. I wouldn’t think extra spinach would cause something as extreme as bloat. Keep offering her hay and encouraging a bit of movement. If it is just regular gas, that will help.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.