Hi, my friend had her bitch tested at croft reproduction and her levels were 8.6 thursday, they said Monday/tuesday best day for mate. She took her bitch yesterday for mate and the stud owner said that should be fine. What do you all think?

If she got a mating yes, but I would always prefer at least two mattings over three days (or three one every day). so want another tomorrow. 

Also if bitch or the dog aren't keen you know you were right and she is going over. 

If she is happy to be mated it will catch any stray eggs, and possibly the semen will be better as the first mating will have cleared the tubes.  If a dog hasn't been used for a while the first ejaculate will have more detritus.