Farmville animals missing once mastery begun

[Cheenu]

Recently, I have found that my Mustang as well as English cow have gone missing once the animal mastery has begun. I know they have not been by mistake sold for the reason that they were kept inside the stable and dairy and never removed. I am not pleased. I have already contacted to the CS but so far I have heard nothing regarding this.

[RyanInt]

I think that they will be back after some time. My silver foal becomes invisible for some times and after that they came back eventually. It may be same case for you as well.

[Common]

I have a lot of the animals I doubt that I would ever notice if most of them disappear. Maybe I should go through the masteries to perceive. None of them are in storage therefore they should all encompass mastery points previously. My Percheron departed as well and I am still waiting to hear back as of CS