Dog Training Job - Cape Town, WC, 7570

I got Bentley when he was 8 weeks old. The first predicament I noted was his aggression when eating or with food in general. I quickly taught him out of that bad habit and to state hereof he waits for my command before he eats. As time went by, Bentley was bitten thrice at the time by my sister inlaws labordor mix. As Bentley became an adolescent he attacked my late Jack Russel, twice. Ever since the occurence Bentley has been aggressive. This aggression makes me very hesitant to take him on walks as he has broken loose from his chain on a previous occasion. I am scared something bad would happen if another child/person or dog should be in his path. I must add that Bentley is extremely loving to me and obeys my authority to a degree. However, when he snaps I am just not able to control him or dont know how to address the situation. My story gets even deeper, there is a high chance I may need to look for alternative accommodation for Bentley as I am currently living with my mother and she is selling the house soon. My financial situation makes it difficult to obtain a pet friendly place. If I do need to surrender him, I want to do the best I can for him and give him the best life I can. I feel the agression and other traits needs to be addressed to increase his chances of finding a loving home if needs be. I am stuck in a situation and I require professional help. Thank you
Justin/JP.