Dog Allergies Treatment

My husband is a Petty Officer in the Navy and we just found out he’s allergic to nuts, celery, dogs, carrots, and mold. The doctor on ship said that he can no longer eat on ship because of his allergies and that they would have to pay him to eat off ship, but if they ever deploy he cannot eat on ship for months.

Could they kick him out for having food allergies?
Or do you think they’ll put him on shore command?

-concerned navy wife

I ask because I use front line on dog and put it on correctly but poor thing still gets fleas fairly bad, my cat however isn’t on anything and doesn’t get them at all. Even after ill get fleas off of dog and he will be free for a week or so he still will scratch and be up all night. Could allergies or skin problem make fleas worse?
He’s a 6 yr old poodle