I have two male rabbits that run freely around the garden all day. Since lunchtime there has been no sign of one of them; although we have looked everywhere for him. The only place I can think of is the drain; we have several long plastic pipes for drainage with an opening he could at least get his head and most of his body into. Would a rabbit be able to wriggle out backwards if he felt himself getting stuck? They would never voluntarily jump into water deep enough to drown them, would they? Any thoughts?