I made chevre for the first time this season. I let it sit for about 20 hours. temp stayed between 70 -73. When I went to drain it was not smooth, had a slight bubbly appearance. It was not floating or anything just not the texture I am used to seeing. Has no off odor. Is it o.k. or is it chicken food?
If it was bubbly and spongy, it sounds like some sort of contamination either in the milk or your equipment. Usually if it has a spongy consistency it has a yeasty odor as well.
You could always try to drain it and see what sort of taste it has.
Bonnie