The Dead Kitties Mystery

7 little kitties sitting in a garden...
one fell through the matrix and soon there were 6...

6 little kitties standing by a cliff...
one took a dive and soon there were 5...
 

5 little kitties sleeping on a bed...
one developed bedsore and soon there were 4...
 

4 little kitties climbing up a tree...
one feel down and soon there were 3...
 

3 little kitties licking their shoes...
one fell ill and soon there were 2...
 

2 little kitties staring at the sun...
one got its eyes burned out and now there's one...

one little kitty murdered on a desk...
solve this mystery and help laid the kitties to rest.