Im not so sure I would feel comfortable AT ALL with a PET transport company....I honestly dont think I would trust him.. Although cargo would not be my choice, I would certainly choose it before a transport company!! I would NOT trust them at all ( but that is my personal opinion)!! Maybe your vet could give you something to help him relax so you could keep him under the seat and with you!! I just would NOT feel comfortable with a transport company , here is something that happened here in Ma.
http://www.care2.com/news/member/325453706/1189160
these puppys were near dead, they were not fed they were over heated and not walked.. Please choose another source of transport!