Is adult mice enough for this python?

[Pazzoman]

Hey everyone, my cousin recently got a ball python at a reptile show and forgot to ask the breeder what size mice she war eating. So he asked a vendor selling mice and he felt the snake bag and said "adult mice will do"...sold him these adult mice. The snake is probably 30 inches or more, but my cousin think it maybe too small so he might need two or maybe one of the next size. What do you guys think? I said go with the thickest part of it's body...but he said he still is unsure unless he literally sits the mice next to it's girth.

Opinions?

Also it recently had a bad shed (first shed home) there were pieces everywhere they said. They do have a large water bowl, my cousin said he sprays him every so often...any ideas?