I started using Convert 4 years ago and it has been a godsend to say the least. It is manufactured by Agrarian Products and distributed by Select Sires. It is a powerful probiotic gel spiked with electrolytes. Basically in a nutshell it colonizes the gut of the baby calf with "good bacteria" like lacto bacillus etc. Once the gut is lined with the good bacteria, if anything harmful is introduced to the digestive tract, it has nowhere to attach and goes right thru. I am not big on scientific explanations and this is purely a layman's description of how the product works. The electrolyte package in the gel is great for helping the calves get going quickly in cold weather. If you need more info or want to talk about it call me at 308-760-5695. I would be more than happy to elaborate on my experience with this product and how it has changed my operation from birth all the way thru post weaning.
Aaron