Hello everyone! Hope you all had a wonderful Thanksgiving for those who celebrate! 
I have read a few forum posts on this site in regards to how much water your bun should be drinking, but I wanted to see if I should be concerned with Bumi’s drinking habits or not. First of all, he is acting completely normal, eating good, poo and pee all normal, and acts like a very happy little bun. (He’s a holland lop, and weighs maybe 3 pounds or less.. I can’t remember how much the vet told us.)
For the last month or two, he started to drink practically his entire 16 oz bottle of water at night (I’ve noticed that it seems to happen between midnight to 7AM). I’ve read conflicting total amount of ounces healthy bunnies drink, some suggest it’s normal and some suggest that 16 oz would be high. He gets his daily salad around 6-7pm and then his 1/4 pellets at around 8-9pm. Before he started this drinking habit he wasn’t eating as much hay, so now that he does eat more hay, I was expecting his water intake to go up (but just not this much all at once). He doesn’t eat all of the hay at night, however, so I’m wondering if the pellets make him thirsty? I was also wondering if he does this because he is bored. We lock him in his cage at night for safety, but he has been allowed free range in his x-pen all day and now has access to free range of the room he’s kept when we are supervising him. There’s no other signs that I have noticed that would indicate he’s bored.
Outside of this, he is very perfectly normal, and even a well behaved un-neutered “teenager.” We do have plans to get him fixed, but I’m not sure if that is relevant to his drinking habits. I’m just concerned that this might be an underlying problem but since he is acting normal, I’ve gone back and forth in my concern.