The chicks were owned by Arusha-based businesswomen Mary Matia who is still in police custody.
Tanzania banned poultry imports in 2007.
Tanzanian veterinarians have condemned government’s decision to burn 6,400 chicks that were illegally imported from Kenya.
The chicks worth TSh12.5 million were impounded on Monday through the Namanga Border Post in Longido District, Arusha Region.
They were set alight on Tuesday.
Expressing his concern, Executive Director of Tanzania Animal Welfare Society Thomas Kahema said the government had alternative ways of curbing disease outbreak but ignored them.
Northern Zone veterinarian Obedi Nyasebwa cited prevention against outbreak of bird flu and other diseases as the reason for burning the illegal import.