Is it possible to give rabbits oats?

Except in situations where the rabbit's fate is predetermined for slaughter and there is an urgent need to gain weight, oats should not be a permanent ingredient in the rabbit's diet. Rabbits should not be confused with horses, and horses are not always given oats, because overfeeding oats leads to a very dangerous disease - laminitis. For rabbits, oats are also not a healthy food, since they contain a large amount of carbohydrates and sugar; excess oats is a direct path to enteritis, diarrhea, gastrointestinal stasis and gas formation. 

As for fattening, at the final stage they give whole raw oats - a teaspoon per 2 kg of live weight, but not porridge: evolution has not endowed rabbits with a stomach capable of processing cooked food. Cooked oatmeal will make a rabbit bloat faster (and with a likely fatal outcome) than it will gain weight to slaughter condition. 

Yes, rabbits can eat oats, but that doesn't mean they need to be offered on a regular basis. 

The main source of food for rabbits is good hay! They need fiber, which helps prevent the formation of harmful bacteria in the intestines.

Hay for rabbits with timothy and fescue. It is high in fiber, which aids digestion and prevents gastrointestinal problems, and is low in calcium and protein, making it suitable for rabbits of all ages, including those prone to urinary tract problems.

Meadow hay is a “cure for boredom”, a mixture of various cereals and fragrant herbs. This type of hay has a greater variety of flavors and textures, which will help stimulate your appetite and relieve winter boredom. Meadow hay is rich in fiber, which aids digestion and promotes healthy bowel function.

Oat hay is a nutritious option for rabbits who require a higher calorie intake. This hay is slightly higher in protein and fat compared to timothy, fescue and prairie grass hays. Oat hay is given for fattening, for pregnant and lactating rabbits. 

Alfalfa hay, rich in calcium and protein, is only for rabbits up to six months old, pregnant and lactating rabbits. It is not suitable for adult rabbits due to the high calcium content - there may be problems with the urinary tract.