My two males are the same way. I find, however, that Nelson gets much quieter and calmer if I put him in a pillowcase before putting him in the carrier. He will let me gently drop the case over his head and work it down over his entire body until he is completely inside. Then I can lift the whole bundle into the pet carrier. He almost goes limp while I'm doing it. The vet tech says she has seen other cats like that, too. Somehow they feel safer if they can't see the carrier, or maybe they think they can't be seen by any enemies when they're covered like that.