@xochiquetzl_xkvn I have had the same with two foxes and they even stole some of the harvest (Soyabeans and mushrooms) from sheltered plants. They must be vegetarian foxes. 😇 I have a sort of glass house attached to the farm I build in Henford-on-Bagley. @PugLove888, so, I do think this is part of the design of the gameplay. In the wheel you will find the option to ask the foxes to stop stealing. But you can only ask them when you have a good relationship with them. Every time my sims ask them their relationship goes down again. It will be extremely hard to get the foxes that far.
About the bunnies. You can invite bunnies onto your lot, but you will first have to befriend them in the wild. As soon as you have a reasonable established relationship with a wild bunny you can ask it to help with or in your garden. From that moment you will be able to buy a bunny stump in the build/buy section. Then you can ask wild bunnies to live on your lot. I invited three. I haven't seen them in the house yet but you could try to create a sheltered garden space. That might attract them into the house too. Btw, you will be able to do the same with the birds.
I will try to lure a bunny into the house but i doubt they will take the stairs. 🤣
Have fun playing. 😉