Can cockatiels eat oats?

Yes, but only a little: cockatiels can eat oats. Germany’s TVT counts oats as a staple, but the RSPCA says seeds should make up no more than a tenth of the diet. The TVT lists oats and wheat among the grains in the staple seed diet, and the AAV includes whole grains in a cockatiel’s diet. Germany’s Veterinary Association for Animal Welfare (TVT) and the Swiss animal welfare society (STS) treat seeds as the staple food. The Merck Veterinary Manual suggests a 30–40% seed mix for small birds such as cockatiels. The RSPCA says cockatiels need some seeds each day, but no more than a tenth of their diet, so we err on the side of caution.

How to serve it: as whole grains, a small amount

Good to know: None of our sources mentions rolled oats specifically – the TVT refers to grains as part of the seed diet.