A month is still a short time to expect too much, he might just be a bird that is more on the shy side. Do you have a separate cage for the cockatiel?
Another thought...should he really get egg every day? I thought I had understood that when they are molting they may have some egg a couple times per week. I hope others will chime in, is it possible he is feeling physically a bit low energy such as when we eat too much and are too full?I read to him and talk to him a good bit, he gets chop with boiled egg whites in the morning with some seed mixed in, and seed/pellet mix at night.
Oh I'd appreciate some input on that too -Another thought...should he really get egg every day? I thought I had understood that when they are molting they may have some egg a couple times per week. I hope others will chime in, is it possible he is feeling physically a bit low energy such as when we eat too much and are too full?
You mentioned you'd keep the new bird quarantined for at least two weeks. That is way, way to short a time. You want to quarantine for a minimum of 30-45 days. It's great that the breeder tests for illness, but some things may be in an early stage and not detectable at the time of testing.