Pulock skated with rookie for the second day in a row on Friday in East Meadow with Nick Leddy paired with Johnny Boychuk again. Trotz split up that longtime pair and put Dobson with Boychuk and Leddy with Pulock after Pulock’s partner, Adam Pelech, suffered a season-ending Achilles’ tendon injury on Jan. 2…Retired defenseman Dennis Seidenberg, now a member of the Islanders’ player development staff, practiced with the team for the second straight day.