Literacy

We seek words with the following meanings:

1) A breach of mealtime etiquette

2) Disparaging remarks

3) A decline in fortune

4) Overweight

5) A feather

6) A channel to carry water.

Each is obtained from the previous by changing one letter. What are the words?

Friday's answer:

"He often chills BSE meat" is an anagram of "The Silence of the Lambs".