I don't have a vet that deals with birds around, SHould I give him some tylan? What does and how?
Before I could recommend a dose, I would need to know his weight. Just a guess, but he should probably weigh 3-3.5kg at his age.
FWIW, the food scale in my avatar was around $20 at Target. You could also hold him while you're on a scale, then weigh just yourself and subtract from the previous weight.