Yes. They have a four chambered stomach just like a cow does.
Cows, and any animals that chew cud (ruminants), have a four chambered stomach. Horses do not chew cud and only have a one-chambered stomach. (pseudo-ruminant monogastrics.)
Horses do not have a multiple-chambered stomach. They just have a single stomach like a human or a dog has, not multi-chambered like a cow or sheep has.
Three
No, they do not have the same digestive system as a cow. They have a single chambered stomach.
Llamas, Alpacas, and Camels.
Most animals' stomachs are called a stomach
A cow...but it's not actually multi-chambered they have 4 separate stomachs.
The palomino horse a monogastric digestive system, (it has a single stomach with a single stomach chamber, as opposed to a ruminant digestive system, which has a four-chambered stomach. )
Camel or llama
The goat has one very large stomach with four parts; the rumen, the reticulum, the omasum, and the abomasum.
Deer have a four-chambered stomach.