Blossom snores at all different volumes, lol, sometimes she just purrs, other times she can raise the roof off the house.
Dozer very rarely snores, you usually don't hear him.
All depends on how ruthie sleeps. On her belly, usually sounds like little nose gurgles. On her side, watch out, that dog is tired and she's shaking the whole house.
I wish I would've put all the above, but I chose "Like a freight train" because when she's really tired, and dead asleep she is so dang loud! If she's just taking a little nap she may not snore at all, or very quietly.