Today I checked on the newt that I thought had an infection before, and it appears I was wrong. The white stuff I thought was the infection turned out to be his bones sticking out. So now I guess I don't have to separate him from the other. Now all I need to worry about is getting him to eat, because he's really skinny.
I also went into the pet store today and asked them where they got their newts, and they said they get them from a place that breeds all their animals. And to be honest, the first two newts I bought were in good condition when I bought them as far as I can remember. Only one had a few missing toes on his foot. I think that the one I have now with the missing foot and all the missing toes ended up like that because his legs got caught in the filter, and he lost some parts, and now he's skinny because his body's trying to recover. The only newt I had a problem with was the third one, who had a missing foot and a white spot on his back that might have been an infection, and he was also skinnier than the other two. I think that all the toes and such he was missing when he died was caused by the filter as well. I haven't had any bad experiences concering pets I've bought from this store before, except for this last newt I bought, and that could've been my fault. Is it better to stay on the safe side and not buy any newts from them anywy? Today I ordered a couple newts, which they'll have in by Tuesday. And now that I know what to look for, I can check to see if the newts are healthy. Any comments?
(And yes, I'm referring to my newts as males, but I don't really know what their gender is. And I think that they're too young to tell what they are right now.)
EDIT: I'd also like to say that the three newts I bought were the last three they had in stock, and that they had more before I bought mine, so the ones I bought were probably the leftover newts that people didn't want to buy because they were the least healthy of the bunch, but from what I saw, they were still pretty health except for the one.
EDIT: I'm not trying to go against what you guys have told me, because I really do respect what you all have to say. You're all so helpful and informative. But I also have my own opinion, especially about this particular pet store which I've been going to now and then for years, and I want to be certain that the newts they're selling really are in bad shape before I stop buying newts from them forever. I hope you all understand.