Causes of overeating disease in sheep

A man spoted sharing a piece of mango with a ram at Wei Wei trading center in west pokot county. [Christopher Kipsang, Standard]

Dear Daktari, I keep sheep, I have been doing this for quite a while and one of the reasons I chose them was because I learned they are relatively resistance to diseases and also grow fast. However a few months ago when the rains started and we had enough pastures I lost ten within a week then the deaths suddenly stopped. I shared this with a Vet who suggested the cause of death could be enterotoxemia? He late did some herd health on them and this included vaccinations and I hope that is the last time I will lose my sheep.