It is very bitter...mom tried it...
We give them a couple cc's of Karo syrup after giving the calsorb and it seems to prevent the vomiting. We have more trouble with Nutridrops and Nutrical making them vomit during delivery. Since we started using the Karo we have not see the problem.
Calsorb is a lot safer than injectable Calcium and should at least be kept on hand to be given at the first signs of eclampsia and then head to the vet. We introduced our vet to it and she will not be without it now!
I would be hesitant to use it if I was new to whelping but we have been breeding for years, starting with Standard Poodles over 10 years ago. It is best to find someone who lives near you that will help you with the whelping process and mentor you through your first few deliveries. This is where being a member of your local breed club and participating in AKC events helps you find the right people to help you out!