Tollers are known for their self-red colouration, meaning that their pigment matches the red coat and they do generally have light eyes (sort of an amber colour as an adult). However, this is not true of all sporting breeds/retrievers. He's definitely not pure Toller, but I think there is a chance that he has some in him. That being said, if you're in guam, he might not have any in him at all as there are probably not many there seeing as they aren't a common breed. Lots of mutts and other purebreds can have the same sort of appearance as pups.

Good luck with his worm treatments and such! Hopefully he'll be better soon.