Dear Dr Bruce, thank you very much for your quick reply. Your advice incl. the article you sent is very helpful! My friend's dog and Igu have only met once very briefly. My friend was in my hallway and Lev (her dog) was on a leash. Igu came running and hissed at Lev. And Lev was a bit scared. On the other hand Lev gets excited and barks when he sees a cat in the garden and chases after it. He does the same when he sees squirrels for example. Do you think this is a bad indication? Or do you still think that there is a chance that the two could get used to each other?
Thank you so much for your advice! I think we will arrange another meeting of the two then and try to get them used to each other!