Is it possible to do table lookups for dropdown choices

I need to allow a user to choose from a dropdown and based on the dropdown choice made, a value substituted via a lookup table into another field.

i.e

Chihuahua - Small

Rottweiler - Large

St Bernard - Giant

Border collie - Medium

Irish Terrier - Medium

User chooses the dog breed and the system automatically populates the breed size into another field.

I understand that you want to populate the size into a field when the user chooses the dog breed from a drop down. 

Please let me know if I am missing anything here. Please take a look at this form and let me know if it works for you.

http://form.jotformpro.com/form/42256358122956?

Please get back to us if you need further assistance. We are happy to assist you.

I can see how that works but we would need over 150 breeds of dog. Somewhat arduous to setup that many rules, was hoping a neater way would be via a lookup function of some kind.

Unfortunately, there is no feature available as such. However, please allow me some time to work on this and get back to you if I can suggest you a workaround.

Thank you for your patience.