Heart block: Failure of the heart's normal rhythm controls leading to arrhythmia. Heart block: Impairment of conduction in heart excitation. It is often applied specifically to atrioventricular heart block. Heart block: recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeat.
For pet rabbits and show rabbits, pine is completely safe for rabbit litter, especially kiln-dried pine. Kiln-dried pine is also the cheapest rabbit litter on the market. And since it does a comparable job to all the other litters, pine shavings as rabbit litter and rabbit bedding gets our top vote. See Rabbit Bedding for comparisons with several other rabbit bedding materials, and more recommendations.
Rabbits cannot expel gas and plants such as Clover causes gas. Feeding on foods that produce gas can result in bloating, pain and if not careful can be fatal. It is best to confine the rabbit's grazing or eating part of the garden to a grassy area. Foods that are safe to feed a rabbit in small amounts are Basil, Beet Greens, Carrot and Carrot tops, Celery leaves, Dandelion leaves and flower, Dill, Mint, Parsley, Watercress, Wheatgrass. From the above list, it can be seen, some common herbs are fine to feed.