sick birds

Good evening! I have recently been fostering 2 baby egrets (I think they are egrets. not sure) who were found on the road. I was planning on releasing them in the wild once they grew up. But now they both seemed to have developed splay legs issue. They also have weird yellowish poop which...

So I have a safety concern that when I go places where other birds are present that they will have some sort of infection or virus or airborne transmitted issue that I will then take home to my birds. Most of my fears are unrealistic and paranoia but can you all help me to differentiate between...