I went to drop off my dog today to be spayed. I asked about ACE and the woman told me that they haven't ever had problems and said that it is all that they used; and because I have no idea why it isn't supposed to be used I couldn't exactly fight her on the subject. I am really worried about my dog we have had the appointment for months and I was kind of against a wall. I tried to look it up last night on the internet but it didn't bring me to anything that was of use. So if anyone knows what it can cause that would be nice... I would just like to have a heads up.