Cockatiel with diarrhea.

I got a new female cockatiel one day ago and she has diarrhea. Since today my old one has diarrhea too. He hadn't before. Im a bit worried about them, what can I do to help them because I can't take them to vet. They have been eating regularly but look kinda sleepy. I have feed mostly seeds to them. Some eggs and broccoli too but im small amounts. I am also uploading a photo of them.