Can anyone can try to figure out what type of dog mix my puppy could be?

he is brindle coat medium length, floppy ears just about 5 months old with webbed feet, i have seen his brother who has a much longer snout then him and loooks something like a border colie. p.s i have been told he could have lab cause of the feet and maby even some stafford or german shepard thanx for your help guys c: i will try to post up a picture soon.