House Rabbit Community and Store
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The subject of intentional breeding or meat rabbits is prohibited. The answers provided on this board are for general guideline purposes only. The information is not intended to diagnose or treat your pet. It is your responsibility to assess the information being given and seek professional advice/second opinion from your veterinarian and/or qualified behaviorist.
Since we are a house rabbit forum, many of our members are not educated in baby rabbit or mother care. Additionally, we do not allow discussion of breeding/litters. I am going to remove the last sentence of your post for this reason. 
Oats are generally safe to give to bunnies but not usually recommended because of their high nutrient density. Since it isn’t required, I would forego the oats for bunnies of any age. Oat hay, maybe?