Hi I have a male cockatiel also a male budgie, both are out all day till late evening when they both go into their own cages. They do squabble a little but seem to get along quite happily.
Next week though we get a second cockatiel, a female who will only be about 9 weeks old. The breeder has suggested I put her in the cage with the budgie but I wondered if she would be ok with the cockatiel. There will be no nesting box in the cage, and he's much quieter personality than the budgie