female boxer- 2 yrs old

Question
I have a female boxer she has a lot of white milky discharge coming out of her vagina. it's about time for her to go into heat but we have never seen this before. is it normal?

Answer
It could be normal for her, if it is like that every season.

But with seeing the severity, it is impossible to say or diagnose.

If it is "a lot" as you stated, call and ask your vet or vet assistant about it. It could be an indication of an uterian infection too.