I’m not the most knowledgable person here by any means, but my bunny has had a UTI and bladder sludge, so we’ve been through some pee problems. I would watch him while he’s in the litter box. When my bunny, BunBun, had urinary issues, he would take forever to pee. He would lift his tail, go a bit, shift position, repeat, and so on. He would also strain and posture, sometimes twisting his body in pain. More suble signs when he wasn’t really bad but still not right- he would widen his eyes while peeing, or close them. A few times he’s gotten the hiccups whille going- I don;t know if this is anything because that happened when he was healthy. Oh yeah- he would also eat poops- not cecals- from the litter box (very attractive habit) and he would get an attitude, chewing on everything that wasn’t food in a fury. He would go into his cardboard box and just rip apart like a madman- I think he was uncomfortable but didn’t know what to do, being a bunny and all, so he just chomped on things to vent.
Appetite is also important- Bun never stopped eating with his sludge/UTI, but he wasn’t as enthuastic about things as usual. It sounds like Riley is eating fine and acting normal- that’s pretty reassuring. Also, the change of litter, turning off AC and humidity could be factors. Drinking more doesn’t sound like too big a deal as long as he’s not drinking for several minutes at a time every half hour or so and peeing huge amounts- that could be kidney problems, but he’s awfully young for that.
I think keeping a close eye on him is a good idea- but I could be wrong. I’m sure other, more experienced bunny people will give you advice on this . Wow, these bunnies are such a joy, but I don’t think I’ve worried about my human kids half as much as them! I hope Riley continues to act fine and that all is well
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