posted 8 months ago
We have Shetlands with our Icelandics (not as big as Jacobs but they're bigger than Shetlands) and they do fine. A lot depends on the temperament of your larger sheep. If they tend to be aggressive, it's probably not a good idea. Even if they are gentle, you'll go through an introductory period, but they'll adjust fine. I would get two or three though, not just one. It's always easier to introduce multiples, even within the same breed.
The hardest ones to introduce are rams to other rams. Ewes are generally pretty simple, and a single ram to a group of ewes is also fairly easy (as a general rule).