My bunnies (and my parrot) are pretty good waste-wise. I use cloths as much as possible for cleaning their cages (I have green cloths for the bunnies, and red cloths for Dory), I hate the amount of waste from using paper towels although sometimes I do run out of clean cloths (or get lazy) and have to use the paper towels at which point the paper towel always goes into the green waste recycling bin. The bunnies litter and the litter from the bottom of the bird cage goes into the green recycling bin. I use only vinegar for cleaning which is way more enviro friendly than other things too. I suppose their bedding is good too, since I use fleece for bedding in their cage which is obviously washable and reusable. Also buying hay in a bale rather than bags, saves on bags and trips to the store.
The biggest waste for me is probably the plastic bags that I put my fruit and veg in when I’m buying it at the market. If I’m just getting one of something, such as a single sweet potato, I won’t put it in a bag, but there’s still plenty of roly poly things like apples and kiwi fruit that need a bag for weighing.
In terms of toys, I don’t buy many toys for the bunnies, more for Dory as she chews them up pretty quick. Though I do like to save remaining parts from chewed up toys to create new toys with and I do make some of my own toys using fallen branches in our yard.