Looking for a street begger with Beagle

Dear all, for a few days i have visited Brussel as turist and i've experienced something horrible: on the main shopping street Rue Neuve near city 2shopping mall there is a church called Notre Dame de Finistere, there was a street begger in the morning of saturday 13.08 which had the most beautiful beagle dog i have ever seen, white with only a few spots of braun who was trembling like he was dying in the next minute. I went to them and asked what is wrong with the dog , but the man only spoke french, however i understood that the dog is cold. Than the man said that his father was or is algerian and his mother flamand and that he is living very poorly. I left but after a few streets i realised it was smth wrong in all this. How can a dog.tremble if the weathter is warm. I own also a beagle and i know that is impossible. Also how can a street begger own abeagle, these dogs are expensive usually, i started to tremble myself because i realised that that man was abusing the dog by giving him smth to make him tremble so that the people are impressed and give him money. I saw documentaries about this sort of things and i 'm sure it was the case. I returned on that street but i couldnt find them anymore.Since them i lost my peace of mind and soul. I called some.animal protection organisations, they told me to call the police, but i dont speak any french and i ve noticed that in brussel people rarely speak english. All i want is to find that dogagain , to return it to his owner in case it was stolen or to take care of him myself , to give him comfort. In the mean time i returned to my country, but i'um desperate, i know is not realistic to hope that i can find them again, but maybe somebody can give Me any information about what i could do further, where to write , whom to call or maybe even if somebody ever saw this man near city 2 shopping mall.
Thank you very much in advance,best regards to all, Kristine