Two forms of vitamin A are available in the human diet: preformed vitamin A (retinol and its esterified form, retinyl ester) and provitamin A carotenoids [1-5]. Preformed vitamin A is found in foods from animal sources, including dairy products, fish, and meat (especially liver).
Rabbit tobacco can be used medicinally in several ways. Smoking the leaves is good for sinusitis, head colds, and congestion. In hot teas, it is used to treat sore throats, fevers, diarrhea, colds, flu, pneumonia, asthma, and coughs, as well as a mild nerve sedative, a diuretic, and an antispasmodic.
Grass hay is rich in Vitamin A and D as well as calcium, protein and other nutrients. Eating hay promotes healthy teeth and gastrointestinal tract and should be available to your rabbit at all times. Varying the type of grass hay or mixing hays is a great idea (such as timothy, orchard, oat hay, brome, etc).