How much water should they be drinking?

[Bville]

These are my first pet rabbits so I don't know how much water they should be drinking. They only seem to be drinking a little. I have put water into two different bowls and they have a bottle too. I have also wet some endive lettuce and given them that.

They were eating fresh grass from the lawn yesterday when I put them in a pen on the lawn. For food they are only eating Timothy hay and don't like the pellets I bought so I have to try another kind. They seem to be peeing and they sure are pooping.

 

[Azerane]

Some rabbits drink more than others. You are doing the right thing by giving them both a bowl and a bottle first up, they may prefer one over the other. It's likely that since they were eating fresh grass yesterday that they simply didn't need to drink as much. As long as the water is available and they are drinking something, I'm sure they're fine