The crossword solutions for the term 'Chicken Lack' are LIPS (4 letters) and NERVE (5 letters). Chicken Lack is a condition that affects chickens, where they lack the ability to produce certain proteins. This condition is caused by a genetic mutation that affects the chicken's LIPS and nerves. The mutation causes the chicken's LIPS to be unable to form properly, and the nerves to be unable to transmit signals correctly. As a result, the chicken is unable to produce the necessary proteins for normal growth and development.