We've fit quite a bit in our mini van...we transported a full grown ram, 2 full grown intact male alpacas (that was actually a mess...they hated each other and there is still alpaca spit on the ceiling after a year), goats, chickens, and a miniature donkey. If you just need to transport 2 sheep, I wouldn't buy a trailer...especially if you have a van, station wagon, or truck, or know someone who does and would let you borrow it.