Last week my bunny was acting lethargic and had pink- reddish urine one time. I immediately took him to the vet, and they could not find anything wrong with him. His urine returned to normal, but he was still lethargic. I took him back to the vet on 3 days later, and they still had no suggestions. They gave me an antibiotic in case there was an infection but said there was no indication that there was. The first vet had strongly recommended against the use of antibiotics unless there was a confirmed infection so I did not give it to him. He seemed to be much better the past few days, but yesterday as well as this morning he is back to being lethargic. He is eating, drinking, pooping and urinating normally. I have a blue light next to my bed, and I've been falling asleep with it on for the past week or so. I believe the few days he was better I had shut the light off. Could this affect his mood? I'm extremely worried and the vets don't really seem to be providing much help. Hes 2 1/2 years old.