No matter how tame some pet rats are, they will always act on their instinct. Apparently there have been quite a few incidents where rats bite budgies through the cage bars. Their nose and teeth are narrow enough to bite off toes, etc. This kind of wound causes serious infections and might result in death. It is also said that rats will attack pretty much any small critters. Other sources claim that rats aren't known for killing birds, just for eating their eggs.
|Photo © World in my eyes|
A few people claim that it's safe, as long as you don't leave them alone, or if you just keep the rats in the cage. The picture above is really sweet, but it's naive to think that rats will not attack the budgies. So if the rats and the budgies are out together that week, it will be under strict supervision by me and Erlend.
Answer: sadly no, unless you are there to keep an eye on the rats while they are out of the cage.
Other posts in this series:
Can budgerigars and cats live together?
Can budgerigars and canaries live together?
Can budgerigars and lovebirds live together?
Can budgerigars and cockatiels love together?