Rabbits urine color

Question
Today my rabbits urine was brown, then neon orange, then bright red. Is this blood? His urine is always pale yellow. What's wrong? I noticed he ate my phillidendron plant, could this have caused it?

Answer
Their urine tends to change color depending on what they are eating.  This article might give you some more information - http://www.rabbit.org/journal/3-1/red-urine.html

Plants and vegetables cause the most noticeable color changes.

Also, you may want to check this out, this is a list of poisonous plants, and philodendren is on the list - http://www.rabbit.org/chapters/san-diego/health/poisonous.html

Kim