If you google “porridge alternatives keto“ or “porridge alternatives low carb” you’ll get loads of recipe ideas. Often they are almond or coconut flour based or using chia seeds rather than oats. Same works for any meal/food item
I really wouldn't know, I'll tag @Rachox for you she will probably know.
It's not the sort of thing I would eat, if I eat breakfast it is always human food, not something I'd feed to a rabbit, bacon, eggs, sausages, that would be my choice.