Red Circles on Rileys paws

Since I'm trying to catch up here I had to go look at other threads to ge a bit of info on Riley and see he was a stray. ( First it's wonderful that you adopted him!! thank you!)

Not knowing what his background I'm taking a wild guess that maybe he had been caged in wire cage for some time? I think pups that are in that situation often get sores on their feet from the wire bottoms. From the photo and since you say it's on all and from the two I can see it looks like the area is about the same which to me would be consistan with the wire-cage senerio as well.

I think the 'salt-soak' would be helpful and then maybe apply one of the 'balms' they have for dog pads, though I'd like to see something like neosporin put on to heal and help with infection... I'd put some socks on to help prevent infection if the wounds are open.
My Missy had a yeast infection along with a secondary bacterial infection on her toe nail and onto pads. I went to 'dollar-stores' and thrift stores and bought several pairs of baby socks. I then sewed long strips of elastic ( used for waistbands) to outside of each sock . When I put them on her I'd crisscross the straps across her back tieing right front to rear left and left front to rear right.This kept them on her very nicely and the elastic allowed for 'movement'.. It allowed me to put ointment on and she couldn't lick it plus kept it from getting infection. .