you are not supposed to feed them about i think 6 hours before a plane ride and no water i believe is 4 hours before? i wouldnt reccomend treats during the ride bc of the poop issue, i'd say bring something for them to chew on like abully stick or rawhide or something, and bring a blankie and toys
when belle flew with me she wanted out of her carrier but they wouldnt let me keep her out

she stuck her head out the whole time and i petted her from my seat...