This was to be used for my sons dwarf rabbit, but he can't get any water from the bottle. We removed all but one of the balls in the spout and it still gets too 'stuck' for the rabbit to move to get water. If we physically push the ball and the water starts to flow, then the rabbit is good to go-but that shouldn't be the case. I think this will work fine for larger animals, perhaps even a standard size rabbit, but for the smaller ones, it's no good. The product seems durable and is a definite spSee full review