by Sandi Ackerman. .A rabbit's diet should be made up of good quality pellets, fresh hay, (alfalfa, timothy or oat), water, and fresh vegetables. Anything beyond that is a treat and should be given in limited quantities. Pellets should be fresh, and should be relatively high in fiber (18% minimum fiber).
Supplement. In scientific experiments, the use of controls allows to study one variable or factor at a time. It is, however, important that both the control and other (experimental) group(s) are exposed to the same conditions apart from the one variable under study.
The other variables are called controlled variables because the experiment is designed to keep them at an unchanging value, known as controlling a variable. A valid experiment should have only one independent variable. Purpose of an Independent Variable An experiment attempts to trace the causal relationship between two factors in a natural process, such as the effect temperature has on the rate of a certain chemical reaction.