Hiya my uncle had a collie he was beautifull very energetic breed , I would always feed twice a day but i guess its whatever suits your dog if he is on a working dog food it is higher in callories for the reason that a working dog is just that , it works for a living and on the go all the time for hours at a time , if he is a house pet and only gets general exercise either leash walks or an hour or so at the park he may be getting too much food hensce the pooing problem . find out how much he should weigh and use the guidelines on his food for the daily ammount if he is over weight or not getting lots of long walks every day you could try cutting his food amount down split it into 2 lots and maybe give him 2/3 in the morning and 1/3 in the evening if he cant wiat till morning to poo if he eats a little less before bed he wont have as much waithing to come out !!! so to speak .maybe feed him about 5 pm to give him chance to go before bed . Most foods if correct for the dog shouldnt produce too much wast matter unless its too much for him in the first place .