This morning everything was perfect. The Sky was blue and my friend call me to walk our dogs. We let them off-leash, they were playing and we were talking and taking pictures... then, Thor found a ball and when I tried to get it to see what kind of ball that was, Thor swallowed the ball!!
I almost fall!!! Because I remembered that one time when I thought Thor did the same thing but everybody told me that I was crazy if I think that would be possible... and actually he was great and nothing happened. Today, I went back home running with Thor and take him to the vet right away!! They did him a x-ray and it revealed THREE balls!!!! 3!!!! So... tomorrow I'll leave him on the vet to be operated.
I have cried a lot, feeling guilty and nervous and mad with him and mad with my friend, because Thor has his huge kong ball, but my friend's dog has always those rubber balls that are big for his golden retriever but no that big (now I know) for Thor... and they always share their toys... I'm almost 90% sure that he has those rubber balls on his tummy. But, as the vet told me, those things happen and is nobody's fault... But I feel so bad... I was so excited today because I prepared his first frozen kongs with yogurt last night and who knows when he will eat them.
Oh please... I need some support guys!! 
...and sorry if I wrote something wrong...