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 control would be using the same amount of water in the exact same size container. Be sure to use the same type of water as well, such as filtered or unfiltered. Once the science experiment starts, document what your control is, along with your independent and dependent variables. This allows you to better monitor and keep track of your controlled variable.