Flaubert wrote a short story called A simple Soul... about a girl whose only love was a parrot and he passed over. When she passed over the parrot was there to greet her. I love that story, it says a lot to me of pets and their unconditional love.
I am sorry u have lost ur guinea pig. Sure, he'll be there for u wen u take that great journey to the other side... hope so.. along with all ur other loved ones who've passed.
I'm a psychic medium (last 20 yrs) and one sitting i remember, the sitter's loved ones were coming thru and bringing evidence etc... but right at the end her beloved dog came thru with a simple message of love.. and she wept..
Animals have so much to teach us, eh?
Love and Light
jan
PS.. on animals becoming human... LOL... my beloved cat Donal passed in Summer 95.. i dreamed about him afterwards, was lovely... but if he had been human i can only say he'd be a biker with tatoos, bandana, harley davidson the lot.... ha ha ha .. he was a character..