My bunny loved his manger and so did we. We were able to fill it on a regular basis with hay and it was also great because it had a rod attached to it for his salt lick. It was nice not to have the hay falling through the holes in the cage. It is incredibly durable. My bunny lived for 16 years and the manager lasted the whole time. It didn't rust and despite the beatings it took when my rabbit would play with it, it never broke or got sharp. I recommend this for any bunny owner.

Pros: Great for bunnies

Cons: Good question

I stay away from any hanging mangers, racks, etc since guinea pigs don't have large paws like rabbits. They have more rodent like feet that can catch in anything that hangs from a cage. Salt wheels should NEVER be given to a guinea pig. Minerals can lead to bladder and kidney stones. Not a guinea pig item. Use for rabbits that need these items.

Pros: keeps hay contained

Cons: any hanging device can catch a foot or toe in it