Yes, i think there may have mongrel parents. I think about golden retriever too.
Is side profile make me think about hunting setter dogs...
i think he have scent hound, he like to smell trails, and he is really good to fetch and bring: retriever...! He have a really good temperament.
anyway, i'm quite sure is is not bred form 2 purebred parents (beagle x cocker!)
I dont know about this tolling dog, i'll make a seach...
Surprised you talk about border collie!
Edgar is quite happy to know you find him pretty, he tell it is because of is freckels...