The particular boy (from Brazil) who owned the dogs was a keen amateur photographer. The 'attack' command was, I think, 'PRINT. I'm still mulling over the 'leave' command, but it was again something to do with photography. Sorry it's half an answer, Merlinius, hope it jogs others' memories. Will post again if the lightbulb goes on :-)
My head is now buzzing with the word "SET" - does that ring a bell with anyone or is it imagination running. Definitely not food tho - I've seen that film too many times to know that.