Please read this i need to know what to do or something about this rabbit?

Hi thanks for reading this i am posting this because it has been bothering me since the last time i went over there and want to know what other people think about it. okay well first i will tell you what side i am on " I think this is mean how they are treating there rabbit" i have 2 pet rabbits and they have a huge cage with shade outside in the spring summer and fall and in the winter we bring them inside and put them in a really big indoor cage but anyways they have had a rabbit for probably about 4 or 5 years and there rabbit is about a foot long and fat and hes not fat because he gets a lot of food he is fat because he gets know excersise because he is kept in this tiny little cage like probably less than a foot longer than him and probably like a foot and 2 inches wide. and i think that is mean if you saw his cage you would think it is way to small for him and he is a really nice rabbit so i feel bad for him. they keep him outside all year round in there garage and that sounds pretty fine but its not because they have him in a window in there garage and in the summer it gets super hot in there and it doesnt help any being in a window where sun can go right at him and it is like sooooo hot in there during the summer i feel really bad for him and now this winter like a 3 weeks ago we went over there and i asked if we could go out and play with there rabbit and they said sure so we went out there and he had this tiny bowl of water tiped over and completley solid ice and he had a really small bowl of food well not really cuz there was NO food in there at all. and he had NO bedding in there what so ever and NOT even a little rabbit cave in there to keep him warm so he had NOOOOOO (food, water, bedding, or cave) NOTHING to keep him warm:( I felt so bad for him because it was freezing out there and he has short thin fur and i had on a big winter coat and gloves in a shut garage and i froze and you could tell that he was cold. :( so i felt so bad so i opened the cage and grabbed him to try to get him a little warm and they had a huge thing of rabbit bedding sitting next to his cage and i asked if they ever put that in there for him and she said yes but its not to keep warm it is for the bottom part of the cage that is under the wire part that he stands on so his feet are not even touching the bedding it is just for under neeth the cage for when he goes poop and pee so it is easier to clean out and they like never take him out of his cage like only once in a great while because they dont pay attention to him and they say he is to hard to get out so when i watched them try to get him out of his cage he did that little rabbit growl / hiss thing and started scratching them but when i tried to get him out he came right to me and let me grab him so i dont think he likes them and even when they can get him out they dont hold him long at all because my friend and her sisters and mom are allergic to him but yet they still have him so I put him back in his cage and grabbed a whole bunch of bedding and put in the upper part of his cage so he could burrow into it and my friend didnt care but her mom got it for the bottom part of the cage oh and i think they only feed him lettuce and a lil hay no regular rabbit food and because his cage is so tiny he like never moves he just sits there in one place he does not have a good life he is an unhappy rabbit and my mom and her mom are really good friends so my mom talked to her mom about him and her mom asked us if we wanted him and my mom said we couldnt have another rabbit since we have 2 but then my mom changed her mind and called her back a week later and told her we would take him and her mom said NO because her younger daughter still wants him and she never even takes care of him. uhh but any ways i feel bad for him and think he has a bad life and would kind of call that animal abuse. so anyways THANK YOU for reading this I know it was really really long but I appreciate it and would like to Know what you think of this. THANKS AGAIN:)