if you want to be safe, every day or so
Every day.
cotton should be washed with cold water
Several weeks, but it depends on how often you put water through it. The more often you pass water through it, the sooner it should be replaced.
Yes, if you really can't find another one. Make sure you have washed and rinsed it thoroughly, several times.
Rinse them with water and you're good!
Water bottles with algae should be thrown away. A water bottle should be washed out every time you refill it (daily) if you wash it out like this, algae will never build up to start with. The Algae could quite possibly cause GI upsets which in rabbits will be very serious.
Whenever the water bottle is empty
Give it to them inside a water bottle. Hang the bottle on the side of the cage with a metal hook that you should be able to purchase with the water bottle.
Washed by the Water was created in 2007.
100
There is not a specific ounce. Any pet store water bottle is fine for them.
You can use a hot water bottle. Put the hot water bottle on the pain and it should sooth it