Our yellow lab's due date is 19 days away and this evening when I got home from work I noticed one of her teats is very swollen on the end, everything else looks fine and the rest look normal as well. I am assuming it is infected or something? I plan on taking her in to the vet tomorrow morning, but was wondering if anyone knows what it is and if I can do something to help her this evening to keep it from getting worse. It looks and feels like it is going to pop.

