Sugar coated

I found an old film enveloppe that I must've taken yeaaaars ago.
And some of the pictures came out with FUNKALICIOUS colors.

I'd like it very much if someone could explain to me what happened, whether it's my fault or the labs.
Some of the pictures are fine, some are magical like the one above.

When I was a kid, I used to go stay at this place in PEI, where you'd rent a cottage like you would a hotel room. It was a very relaxing place, lots of wildlife. Great cooking.
This dog's name is Sam and he is a permanent resident there.

[full view]