> What could I add to my aussie's puppy meals to fill him up as I have to watch how much I feed him as he puts on weight on.
How old is your puppy? They grow so fast that you would expect them to be putting weight on - that's rather the point :)
Some pups give the impression they are half starved and can be quite good at the 'feed me - feed me' look. However if your puppy is still on 4 or perhaps 3 meals a day of quality food then that should be sufficient.
Can you check with the breeder? Did he/she keep a puppy from the same litter? Although litter mates may be different it could give you a rough guide. Also have a look at the output, my breeder says this gives you an indication if you are feeding too much or too little. I'm sure someone will be along soon to tell you exactly what puppy poo should look like - we have experts on here!! :)