Go to the BBB, select the breed, and then look for "Terrain found:". It will list all possible terrain types that breed can be found on. There are several isles for each terrain type, and there is no guarantee that the breed you are looking for is generated at any given moment.
Yes, some grey andalusians can jump.
To find the Golden Sheep in Horseisle, check out the link below.
Anywhere in forests you can find them. They usually are not on horseisle itself, but if you travel you can find them. You can also find them on horseisle if you look hard. Sometimes people drop them on the ground. Then you can just pick them up.
You can find Thoroughbreds on grass.
Please don't categorize this in the topic "Horseisle" as it isn't horseisle.
Andalusians
In the desert, on the ground.
You have to find the construction pattern for it and make it
hoof isle :)
Its in the GeneralStore on GlacierTon
You can find videos that walk you through horse isle deck swabs on you-tube or you can google "horseisle deck swab help".
Andalusians