What made Spanish owned cattle in Texas more valuable during the beginning in 1779

Settlers were allowed to drive their cattle East for sale in New Orleans
Settlers were allowed to drive their cattle West for sale in Pueblo
Settlers were allowed to drive their cattle South for sale in Mexico
Settlers were allowed to drive their cattle North for sale in Canada

Settlers were allowed to drive their cattle East for sale in New Orleans. This opened up a new market for the Spanish owned cattle in Texas, increasing their value.