eye health

Hello, I need help here, I wish to prevent anything from developing from this new very small swelling near the eye. Maybe swelling is a word too strong. It's very subtle. She's a cockatiel of almost 2.7 years of age by now. I fear it's an infection and I want to know how I can prevent it from...

The other day my bird, Noah, had this weird gray goop in his eyes. I wiped it out and it hasn't come back... I am wondering if this is normal much like humans get "sleep" in there eyes or if it's the start of a problem. Otherwise he seems to be healthy and he is 14 years old. Thanks for...